アカウント作成  |   ログイン

View All »Matching Part Numbers


カートは空です
         

光チョッパーシステム&チョッパーホイール


  • Crystal-Stabilized, Phase-Locked Feedback Loop Suppresses
    Low Frequency Drift and Pulse Jitter
  • Manual, USB, and External Trigger Controller
  • 15 Blades Covering Frequencies from 4 Hz to 10 kHz

MC1F10HP

20 Hz - 10 kHz

MC1F2

4 Hz - 200 Hz

MC1F60

120 Hz - 6 kHz

MC1F10A

Adjustable Duty Cycle

MC2F47

MC2F330

MC2000B

Includes Controller, Chopper Head,
and MC1F10HP Dual-Frequency Blade

Controller

Chopper Head with MC1F10HP Blade
(Included with MC2000B System)

Harmonic Blades

Related Items


Please Wait
Key Specificationsa
Chopping Frequency,
with Various Blades
4 Hz – 10 kHz
Frequency Drift<20 ppm/°C
Ext. Reference
Compatibility
TTL/CMOS
Frequency Resolution0.01 Hz (2 Slot Blades)
0.1 Hz (MC1F10HP, Default Blade)
1 Hz (All Other Blades)
External Reference Signal Synchronization
Harmonic2 to 15X
Subharmonic1/2 to 1/15X
  • 詳しい仕様については、「仕様」タブをご参照ください。

Click to Enlarge

コントローラーインターフェイスのスクリーンショット

特長

  • 低周波ドリフトと位相ジッタを低減する水晶安定化位相ロックフィードバックループ
  • 和分および差分リファレンス出力と高調波、サブ高調波、分数調波チョッピング
  • マイクロプロセッサによる制御
  • シングルまたはデュアル周波数ブレードをご用意
  • 高調波ブレードは、励起プローブや非線形実験用に活用可能
  • 不揮発性RAMによるセットアップ情報の保存や呼出
  • USBインターフェイス
  • 制御ソフトウェアが付属

光チョッパMC2000Bは連続ビームを変調するための精密機器です。コントローラはチョッピングの速度とリファレンス信号の位相を精密に維持する位相ロックループ(PLL)のモータ速度制御設計を採用しています。内部の水晶制御式周波数シンセサイザは、長期にわたって安定性に優れた精密な基準周波数を提供します。チョッパMC2000Bは当社の旧製品光チョッパMC2000と比較して、ロック時間が速く、インターフェイスが改善され、またブレードの選択肢も豊富に取りそろえております。

チョッパーブレードが光路を横切るタイミングでリファレンス信号を得るために、光スイッチングシステムが用いられます。このスイッチングシステムには波長範囲850 nm~940 nmのLEDが内蔵されていますが、LEDからの光出力を最小限に抑えるため15 mAの閾値電流で駆動します。

従来品の開ループでの速度制御とは異なり、PLL速度制御回路によりMC2000Bが外部リファレンス信号に同期することもできます。外部リファレンス信号には、他のMC2000Bチョッパからの信号やDSPロックインアンプの信号源なども含まれます。MC2000Bとその用途に関するより詳しい情報は、「動作」タブをご覧ください。

MC2000Bには高品質の希土類マグネットDCモータが使用されています。フォトエッチングで作製されたチョッパーホイールブレードは、厚さ0.25 mmのブルーイング処理済みクロックスプリングスチール製で高精度な設計になっています。コンパクトな光学ヘッドには安定性に優れた幅の広いベースが付いており、ベースには76.2 mm間隔で2つのM6取付けネジ用のスロットがあります。この取付けスロットの半径は38.1 mmです。インターフェイス用ケーブルは、セットアップが簡単なHirose製円形コネクタを使用しています。

MC2000Bのコントローラには、チョッパの設定やモニタを行うためのグラフィックディスプレイ(240×128ピクセル)が付いています。設定は前部パネルにあるノブの回転およびプッシュ操作で行います。不揮発性のメモリを使って複数の設定の保存や呼出を簡単に行うことができます。MC2000BにはPCでリモート制御するためのUSBインターフェイスが標準装備されています。コントローラにはMC2000Bを制御するためのソフトウェアが付属しています。「ソフトウェア」タブからダウンロードすることも可能です。このパッケージでは、C++またはLabVIEWで書かれたプログラムを使用してMC2000Bを制御することもできます。

注:光センサは、光ノイズよってジッタが発生しやすいので、迷光をMC2000Bから遮断する必要があります。

Chopper Blade Specificationsa
Item #Chopping FrequencyDuty CycleMax Phase Jitter
(RMS, @ One Blade Rotation)
SlotsSlot Angle
Single and Dual Frequency Blades
MC1F10HP
(Included with MC2000B)b
Inner: 20 Hz – 1 kHz,
Outer: 200 Hz – 10 kHz
50%±0.2° (±0.1° Typ.)Inner: 10,
Outer: 100
Inner: 36°,
Outer: 3.6°
MC1F2c4 Hz – 200 Hz±0.2° (±0.1° Typ.)2180°
MC1F2P10c4 Hz – 200 Hz10%±0.2° (±0.1° Typ.)2180°
MC1F6P1012 Hz – 600 Hz±0.5° (±0.2° Typ.)660°
MC1F1020 Hz – 1 kHz50%±0.3° (±0.2° Typ.)1036°
MC1F10A
(Adjustable Duty Cycle)d
20 Hz – 1 kHz0 - 50% d±0.3° (±0.2° Typ.)10d36° d
MC1F1530 Hz – 1.5 kHz50%±0.3° (±0.15° Typ.)1524°
MC1F3060 Hz – 3 kHz±0.3° (±0.15° Typ.)3012°
MC1F60120 Hz – 6 kHz±0.2° (±0.1° Typ.)60
MC1F100200 Hz – 10 kHz±0.2° (±0.1° Typ.)1003.6°
Harmonic Blades
MC2F47Inner: 8 – 400 Hz
Outer: 14 – 700 Hz
50%±0.5° (±0.2° Typ.)Inner: 4
Outer: 7
Inner: 90°
Outer: 51.4°
MC2F57BInner: 10 – 500 Hz
Outer: 14 – 700 Hz
±0.5° (±0.2° Typ.)Inner: 5
Outer: 7
Inner: 72°
Outer: 51.4°
MC2F330Inner: 6 – 300 Hz
Outer: 60 Hz – 3 kHz
±0.3° (±0.15° Typ.)Inner: 3
Outer: 30
Inner: 120°
Outer: 12°
MC2F860Inner: 16 – 800 Hz
Outer: 120 Hz – 6 kHz
±0.2° (±0.1° Typ.)Inner: 8
Outer: 60
Inner: 45°
Outer: 6°
MC2F5360Inner: 106 Hz – 5.3 kHz
Outer: 120 Hz – 6 kHz
±0.2° (±0.1° Typ.)Inner: 53
Outer: 60
Inner: 6.79°
Outer: 6°
  • ユニットにはブレードMC1F10HPが付属します。それ以外のブレードは、全て別売りです。
  • 光チョッパシステムMC2000BにはブレードMC1F10HPが1つ付属します。この高精密ブレードは、10 kHzまで低ジッタで安定した周波数チョッピングを行います。 ブレードには光同期用の100個のスロットが外側にありますが、チョッピングの目的でも使用可能です。
  • こちらの高精密ブレードは200 Hzまで低ジッタで安定した周波数チョッピングを行います。ブレードには同期用に100個の小さいスロットが外側にあります。
  • 10スロットブレードMC1F10Aのデューティサイクルは0%~50%の間で調整可能です。
Optical Head Specifications
Chopping Blade DiameterØ4.0" (Ø101.6 mm)
Chopping Blade Thickness0.010" (0.254 mm)
Mounting Base1/4"-20 (or M6) Clearance Slots Spaced 3.0"
(Compatible with Thorlabs Breadboards)
General Controller Specifications
Frequency Resolution0.01 Hz (MC1F2 & MC1F2P10 Blades)
0.1 Hz (MC1F10HP Blade)
1 Hz (All Other Blades)
Chopping Range
Harmonic: 2 to 15x
Sub-Harmonic: 1/2 to 1/15x
Frequency Drift<20 ppm/°C
Input and Output ConnectorsBNC
Display Type240 x 124 Pixel LCD
Menu ControlTwist / Push-Button Knob
Input Power ConnectionaIEC Connector
Operating Temperature10 – 40 °C
Dimensions (W x H x D)6.05" x 2.88" x 11.54"
(153.6 mm x 73.2 mm x 293.1 mm)
Weight5 lbs (2.3 kg)
Shipped Weight9.1 lbs (4.1 kg)
Power Supply
Supply TypeLinear
Voltage Selection115 / 230 VAC Switchable
Input Voltage100/115 VAC ± 10%, 230 VAC ± 10%
Line Frequency50 – 60 Hz
Input Power20 VA Max
Fuse Ratings250 mA @ 115 VAC,
125 mA @ 230 VAC
Fuse TypeIEC60127-2/III (250 V, Slo-blo Type ‘T’)
Fuse Size5 x 20 mm
  • MC2000Bには電源コード(日本国内対応)が付属します。
Input/Output Specifications
Ext. Input CompatibilityTTL/CMOS
Ext. Input Voltage Rangea0 – 5 V
Input High>2 V
Input Low<0.8 V
Ext. Input Impedance200 Ω
Ref Out CompatibilityTTL/CMOS
Ref Out Voltage Rangea0 – 5 V Typical
Ref Out Impedance200 Ω
Min Load Impedanceb500 Ω
Ref Out SignalsInner/Outer Slot Chopping Blade,
Synthesizer, Sum & Diff Frequencies
Ref Out SelectionSelectable Menu or USB command ‘O’
Communications
Communications PortUSB
ProtocolUSB (RS232 Emulated)
Baud Rate115,200 (fixed)
Data Bits8
Stop Bits1
ParityNone
HandshakingNone
  • リファレンス出力と外部入力は電流を25 mAまでに制限することによって保護される短絡回路です。過電圧や不足電圧に対する保護機能がありますが、その状態で使用し続けるとユニットに損傷を与えます。
  • Min Load Impedance(最小負荷インピーダンス)は、最小許容終端抵抗を表しています。インピーダンスがさらに低くなると、短絡回路保護により出力電圧が制限されます。この条件で使用し続けると回路が劣化して故障の原因となります。

コントローラ前面パネル


Click to Enlarge

MC2000Bの前面パネルには2つのメス型BNCポートがあります。1つは外部入力用、もう1つは参照出力用です。両ポートのピン配列は下に示されています。

コントローラ背面パネル


Click to Enlarge

MC2000Bの背面パネルにはUSB2.0 タイプBポートとオス型のインターフェイスコネクタHR10A-7R-6Pが付いた光学ヘッドポートがあります。両コネクタのピン配列は下に示されています。付属のケーブル(コネクタHR10A-7R-6SC)を使用して光学ヘッドポートに差し込むことができます。

チョッパ背面パネル


Click to Enlarge

チョッパのヘッド部の背面パネルにはオス型のインターフェイスコネクタHR10A-7R-6Pがあります。コネクタのピン配列は下に示されています。付属のケーブル(メス型コネクタHR10A-7P-6SC)を使用してチョッパのヘッド部とコントローラの背面パネルを接続できます。

外部入力

BNC メス

BNC
TTL/CMOS、200 Ω入力インピーダンス、0 ~5 V入力範囲

リファレンス出力

BNC メス

BNC
TTL/CMOS、200 Ω出力インピーダンス、0~5 V入力範囲、500 Ω最小負荷インピーダンス

コンピュータ接続

USB Type B

USB Type A
USB 2.0 タイプAからケーブルB

インターフェイスコネクタ

HR10A-7R-6P

6 Pin HRS Connector

PinDescriptionPinDescription
1Motor +4Feedback Sensor
2Motor -5Phase Sensor
3VCC6Ground

動作

Optical Chopper Operation

光チョッパは光を周期的に遮断する電子機械機器です。光チョッパMC2000Bはベンチトップ型コントローラ、モーターヘッドアセンブリ、チョッパーブレード・ホイールで構成される回転式タイプの装置です。

用途

2 Frequency Blade
デュアル周波数ブレードMC2F57B

従来の開ループ速度制御設計とは異なり、PLL速度制御回路により、MC2000Bチョッパが外部信号(他のMC2000Bチョッパからの信号やDSPロックインアンプなどのリファレンス信号源を含む)と同期します。

MC2000Bでは、高度な測定用に外部リファレンス信号の高調波、サブ高調波、分数調波にロックすることができます。搭載されたマイクロプロセッサを使って、外部リファレンス信号を最大15次高調波まで乗算したり、15次サブ調波まで除算したりすることが可能です。周波数乗算や除算を組み合わせることで、分数調波が得られます。

ブレードが回転する際の信号のON/OFFの遷移時間を最小限にするためには、ビームをチョッパーブレードのスロットの1番幅広い位置に集光させる必要があります。

また、MC2000Bは1つのブレードで2つの周波数のチョッピングを行うことができます(例:右のブレードMC2F57B)。当社ではデュアル周波数ブレードを5種類ご用意しております(詳細は下記または「仕様」タブをご覧ください)。1つのブレードに2つの周波数用のスロットがあることにより、単一ビームを分岐し、レシオメトリック実験用に個々に変調することも可能です。ほかの用途としては、励起プローブの実験において励起ビームを外側の周波数で、プローブビームを内側の周波数でそれぞれ変調することもできます。MC2000Bはデュアル周波数ブレードの和周波と差周波を発生させて、周波数の混合した応答の精密なロックイン検出を行うことが可能です。

MC2000B Software Screenshot
Click to Enlarge

ソフトウェアMC2000Bのスクリーンショット

チョッパーコントローラMC2000Bのリモートコントロール用GUI

ソフトウェア

Version 2.1.0

MC2000B制御用のソフトウェアパッケージです。インストーラには必要なドライバが含まれています。 このソフトウェアパッケージは最新のファームウェアに対応しており、C++やLabVIEWのプログラムで利用可能です。

Software Download

Insights:ビーム解析

こちらのページでは下記について説明しています。

  • チョッパーホイールを使用したビームサイズ測定

このほかにも実験・実習や機器に関するヒントをまとめて掲載しています。こちらからご覧ください。

 

チョッパーホイールを使用したビームサイズ測定

 

Arc length of a beam spot, as defined by the parameters of a chopper wheel.
Click to Enlarge

図2:ブレードはfの角回転速度で、 の弧(Rはブレード中心からの距離)をトレースします。図のチョッパーホイールは、MC1F2です。 

Chopper wheel setup used to estimate beam diameter.
Click to Enlarge

図1:上記に示すセットアップでおおよそのビームサイズの測定が可能です。チョッパーホイールのブレードがビーム横切るとき、S字状の曲線がオシロスコープに現れます。

Gaussian beam intensity profile with 1/e2 diameter noted.
Click to Enlarge

図4:ガウシアンビームの直径は1/e2強度の幅で表されます。

Rising edge of S-curve used to estimated beam diameter..
Click to Enlarge

図3:信号の立ち上がり時間(tr )は、通常、強度の10%~90%の時間で定義されます。立ち上がり時間はホイールの回転速度とビーム径に依存します。

カメラや走査スリット型ビームプロファイラはビームサイズやビーム形状を特性化するツールですが、ビームサイズが小さすぎたり、動作範囲外の波長においては正確な測定を行うことができません。

ビームサイズの正確な測定にはチョッパーホイールやフォトディテクタ、オシロスコープが使用されます(図1)。回転するチョッパーホイールがビームを通過すると、S字状の軌跡がオシロスコープに表示されます。

ブレードがθ の角度を掃引すると、S曲線の立ち上がりまたは立ち下がり時間は、ブレードの移動方向に沿ったビームのサイズに比例します(図2)。 ホイールの中心からR の距離にあるブレードエッジ上の点は、ビームサイズにほぼ等しい弧の長さ分(Rθ )、ビームを横切ります。

このビームサイズ測定をするためには、ディテクタとオシロスコープを合わせた応答を、信号の変化の速度よりもはるかに速くする必要があります。

例:S曲線の立ち上がりエッジ
ビームに関連する角度(θ = ft) は、信号の立ち上がり時間(図3)や、ホイール回転周波数f(Hz または回転/秒)に依存します。ビームを通る弧長( = R ⋅ ft)は、この角度を使用して求められます。小さなガウシアン状のビームにおいては、一次近似の1/eビーム径()は、強度の10%~90%の時間で定義されるビーム幅の0.64倍となります。

最終更新日:2020年1月13日


Posted Comments:
Dovletgeldi Seyitliyev  (posted 2020-10-10 21:28:31.497)
Hello, I have broken MC2000 controller, How much it'll take to fix it? Do you fix? Thanks.
Dovletgeldi Seyitliyev  (posted 2020-09-05 01:13:55.957)
Hello, My MC2000 chopper head failed, Controller works fine (tested with identical head), Can you provide/sell chopper head only?
asundararaj  (posted 2020-09-08 04:25:55.0)
Thank you for contacting Thorlabs. The MC2000 and the MC2000B uses identical chopper heads. We should be able to provide the chopper head alone as a component part. For future quote requests, please click the red Request Quote button or contact techsupport@thorlabs.com. I have contacted you directly via email for the quote.
Kelly M  (posted 2020-03-03 08:17:47.96)
Dear Thorlabs technical support, Is there a Linux driver for the MC2000B chopper controller? Thanks, Kelly
asundararaj  (posted 2020-03-04 08:23:26.0)
Thank you for contacting Thorlabs. We do not have dedicated Linux drivers for our chopper controller and do not have any plans for supporting Linux in the foreseeable future.
Tasos Koulouklidis  (posted 2020-03-03 07:26:41.55)
Dear Thorlabs technical support, I use the MC2F47 blade and I try to chop at 25 Hz. Unfortunately this is not possible. If I set the frequency to numbers less than 50 Hz the ref out signal becomes extremely unstable, the indicated frequency constantly deviates and the frequency cannot be locked. The same thing happens if I use an external reference at 50 Hz and try to get the harmonic at 25 Hz. The chopper works fine for higher frequencies though. Could you please help me with this issue? Best regards, Tasos
asundararaj  (posted 2020-03-03 04:52:30.0)
Thank you for contacting Thorlabs. I have reached out to you via email to troubleshoot this issue.
Yaroslav Sych  (posted 2020-01-30 17:52:55.733)
Dear Thorlabs technical support, I would like to ask how to switch off the feedback from the chopper head (measured with the IR diode)? I have designed chopper wheels with my own geometry and need to use all the blade space. Is there a simple way to switch it off in the software? Except for feeding external signal to drive the controller. Kind regards, Yaroslav
asundararaj  (posted 2020-02-04 03:19:44.0)
Thank you for contacting Thorlabs. The IR feedback in the MC2000B cannot be disabled in the software. The operation of the MC2000B relies on the feedback for locking into the right frequency, and so this is not something that can be disabled for normal operation.
user  (posted 2019-10-26 06:14:44.017)
Hello, The included ~2m interface cable is a bit short for my appliation. Is the 10' TC200CAB10 cable compatible with the chopper, or is there any other available cable? Are there issues with changing the cable length? Thank you.
asundararaj  (posted 2019-10-28 05:03:06.0)
Thank you for contacting Thorlabs. The TC200CAB10 would not be compatible with the Optical Choppers, since the optical chopper requires female connectors on either ends. We typically do not recommend longer cables due to the possibility of signal delays among other issues. I have contacted you directly regarding the possibility of offering a longer cable.
BANG-YU HSU  (posted 2019-08-07 22:15:32.357)
Dear Thorlabs tech support, is it possible your motor/fans in MC2000B can work with SR540 chopper controller? Thank you. -Ben
YLohia  (posted 2019-08-08 03:28:01.0)
Hello Ben, thank you for contacting Thorlabs. Unfortunately, we cannot guarantee any level of performance of the MC2000B motor with any third party controller. Our Applications Engineers can be contacted directly by emailing techsupport@thorlabs.com.
Vasyl Yatsyna  (posted 2019-04-18 10:18:15.943)
Hello, I have a technical question about the chopper system and blades. How can we reach duty cycle less than 10 % if the repetition rate is only 5-10 Hz? Can two blades MC1F2P10 be combined for this purpose? We would like to use a single controller for this purpose. Thanks in advance.
nbayconich  (posted 2019-04-19 10:24:44.0)
Thank you for contacting Thorlabs. The duty cycle is independent of the operating frequency of the chopper blades, in order to achieve a lower duty cycle I would recommend using one of the adjustable blades such as MC1F10A. The lower operating frequency to the MC1F10A is limited to 20hz however and cannot be modified to use at a lower frequency. We do not recommend using two blades on one chopper wheel housing, a configuration like this could not be guaranteed to be stable, stability also sets the lower operating frequency for these blades.
xyzhang  (posted 2018-10-31 20:30:41.39)
I bought one MC2000B several years ago and synchronized to a 10 kHz ref signal. It was working fine until recently. The ref input frequency showing on the screening is off by 9 - 20 Hz. Instead of 10000 Hz, it shows 100011 or seminar numbers. I changed to different input frequency, just for checking, still saw the same problem. Please help.
YLohia  (posted 2018-12-03 10:18:12.0)
Hello, thank you for contacting Thorlabs. I reached out to the email provided by you with a few questions about your setup. If you did not receive my email and the issue still persists, please contact us at techsupport@thorlabs.com.
dugan  (posted 2018-07-31 11:09:11.807)
I am using the MC2000B with the standard MC1F10HP chopper blade to chop a 1 kHz pulse train. Everything works fine at the 1st, 2nd, and 5th subharmonics, but I need to chop at 100 Hz. When I get to the 10th subharmonic, I suddenly cannot control the phase. The display says that I've changed the phase, and the chopper will lock again (albeit slowly), but when I look at the pulse train on a photodiode, the phase has not actually changed. Again, this problem does not occur when chopping down to 200 Hz, only at 100 Hz.
YLohia  (posted 2018-09-17 09:44:40.0)
Hello, thank you for contacting Thorlabs. We ran this setup under exactly the same conditions and found no issues. For further troubleshooting, we would have to bring this piece in for inspection. I have reached out to you directly to initiate the RMA process.
lhagaman  (posted 2018-05-29 12:40:43.25)
Hi, do you have any information of how this chopper wheel might behave in vacuum? Any concerns of overheating or estimates of the outgassing? Thank you.
YLohia  (posted 2018-05-29 04:25:57.0)
Hello, thank you for contacting Thorlabs. We do not recommend these units for vacuum-based applications since these contain anodized aluminum so outgassing would definitely be an issue. That being said, we have not performed any testing for this product under these conditions since that is not the intended use.
user  (posted 2018-05-09 15:24:55.553)
what's the material made of (the chopper wheel)? thanks!
YLohia  (posted 2018-05-10 09:28:18.0)
Hello, thank you for contacting Thorlabs. These chopper wheels are made of 0.01" thick blue clock spring steel and have a black oxide finish.
a.brash  (posted 2018-04-13 16:19:14.723)
We have a slightly older MC2000 controller unit, is there any way that this could be made compatible with the MC1F10A variable duty cycle blade?
YLohia  (posted 2018-04-13 01:53:28.0)
Hello, thank you for contacting Thorlabs. Please see footnote d on the main product family page for the blades. Unfortunately, this blade is not backwards compatible with the old MC2000 unit.
marco.cammarata  (posted 2018-03-30 16:45:54.56)
Hi, I have a kHz beam that I want to chop down to ~100Hz. Unfortunately I do not think MC1F2P10 is an option because if I am not mistaken one needs to provide a reference signal higher that the chopper frequency thus creating a phase uncertainty. Am I right ? The other option: MC1F6P10 can be used with beams smaller than the ~6mm I will be using. Thanks, marco
YLohia  (posted 2018-04-04 12:12:22.0)
Hello Marco, thank you for contacting Thorlabs. The MC1F2P10 provides a very stable low frequency chopping of up to 200 Hz. The optical chopper head uses the outer frequency (outer blades) as a reference signal to lock the blade to the frequency generator. Since these outer slots "chop" at a higher frequency, the jitter and phase uncertainty are actually minimized. In addition, this chopper can employ a dual photo-interrupter arrangement to track the phase of the inner slot.
sgreen  (posted 2017-11-21 14:56:22.31)
Can I get documentation for this chopper? Including datasheets, manuals, etc, etc. We are researching choppers and are interested in this one, but need to make sure it's exactly what we need. Any help you can provide would be greatly appreciated.
nbayconich  (posted 2017-12-28 02:36:18.0)
Thank you for contacting Thorlabs. The complete operating manual for the MC2000B chopper system can be downloaded directly from our website under the Document icon. The link below will direct you to the operating manual. https://www.thorlabs.com/_sd.cfm?fileName=TTN102010-D02.pdf&partNumber=MC2000B Additional specifications can be found on our webpage regarding the chopping blade specifications & controller specifications. I will reach out to you directly to discuss your application requirements for this chopper system
user  (posted 2016-12-15 17:40:05.81)
Do any of these blades fit the SR540 chopper from Stanford Research Systems?
tfrisch  (posted 2016-12-20 10:00:34.0)
Hello, thank you for contacting Thorlabs. While we don't have any testing using SR540, I notice that the two systems use a different reference slots, so I would not expect them to be compatible.
meziani  (posted 2016-11-22 13:22:18.73)
Hello Dear We are facing a problem with optical chopper MC2000 where some times is locked at 254.2 Hz. If we fix the frequency at 333 Hz, then after a while (1 or 2 hours) goes back to this frequency and remain locked. We need then to restart the chopper and begin again. We do not know if it's from the motor or from the control. Did you face something similar? do you know how we can fix it? Best regards
tfrisch  (posted 2016-11-30 08:34:42.0)
Hello, thank you for contacting Thorlabs. I will reach out to you about trouble shooting for the chopper.
mjeong3  (posted 2016-08-10 05:13:13.153)
Would it be possible for me to take the blade off to replace it with a different component? I'm wondering what that small thing on the bottom of the mount is. Is that component an absolute necessitiy when it comes to spinning the chopper?
jlow  (posted 2016-08-10 11:53:26.0)
Response from Jeremy at Thorlabs: You can take off the chopper blade and replace it with one of our other chopper blades for different frequency ranges. The small component at the base of the chopper head is the opto-interrupter, which is used by the controller as feedback to actively measure the actual chopping frequency and make adjustment to the motor speed based on the set chopping frequency. It is necessary for the operation of the optical chopper.
ghjkl0822  (posted 2016-01-11 17:03:02.46)
it's going to slow when chopper frequency below 3hz // we use 2slot mc1f2 mc2000-ec frequency 20hz over it's very good work.
besembeson  (posted 2016-01-12 06:11:39.0)
Response from Bweh at Thorlabs USA: I will contact you to get a better understanding of your application and what deviation you see from the expected performance at 3Hz.
m.peccianti  (posted 2015-12-17 14:56:18.85)
We are performing a synchronized lock in detection chopping a 1KHz pulsed sources at 500Hz (On - Off modulation). The chopper is set to target 1/2 of the sync frequency of the laser. However if we compare the target output (not the actual) with the 1KHz sync we can clearly see a time jitter within 10-20us scale and with a period within the 0.1-0.2s. This shift create a significant artifact on the lock-in read which is suppose to discriminate a 500Hz phenomenon on a 1KHz carrier. The lock in should be immune to the 1KHZ as it will be coherently averaged out. Instead the jitter appear as an artifact in the reading. It seems that the target is generated from the PLL (and not from a digital division) and the correction coefficient allows for the given fluctuation. We never noticed the problem before, is there a chance our unit is faulty? (but it is also possible we mistaken the effect with other noise sources) Best
besembeson  (posted 2015-12-21 05:46:23.0)
Response from Bweh at Thorlabs USA: This seems to be a complex issue, but I suspect phase jitter is coming into play. For us to evaluate this further, we would need to know which optical chopper wheel you use for your application. Since you are located in the UK, I will have our UK Technical Support team follow-up with you. On a related side note, we are also in the process of updating the MC2000 firmware with some fairly significant performance upgrades to stability and locking.
stefan.ringleb  (posted 2015-09-02 12:06:46.72)
I just tested the MC-2000 with 2 MC1F2 Blades rotated by 120° to each other. So I got a duty cycle of 1/6 for the copped light. I also could change the phase easily in respect to an input signal. So this works very good. Unfortunately the reference output signal does not have this duty cycle but 1/1. Is it possible to fix this?
joachim.kaiser  (posted 2015-05-07 15:52:55.69)
The reference signal of the MC2000 seems to be captured by an optical light barrier watching the blades. Is there the possibility to switch off/disable the light barriers LED by SW to avoid illumination from the LED?
jlow  (posted 2015-05-07 01:55:27.0)
Response from Jeremy at Thorlabs: The LED inside the opto-interrupter is needed for the feedback to determine the actual chopping frequency. We might be able to circumvent this somehow in your setup another way. I will contact you directly about this.
kedves  (posted 2014-09-30 19:16:01.433)
Dear Thorlabs, is it possible to use two blades with some phase difference in order to change the open/closed ratio from 1/1 to e.g. 1/9, i.e. to transmit only every 10th pulse from a sequence of 1 kHz? Is your model MC2000 with two MC1F2 blades capable of doing this? It should run at 100 Hz chopping frequency and block the beam 90% of the time. The laser is a femtosecond Ti:sapphire laser with approx. beam diameter of 10 mm. The laser provides a synchronization signal at 1 kHz. Thanks.
cdaly  (posted 2014-10-11 04:40:14.0)
Response from Chris at Thorlabs: Yes, it should be possible to vary the duty cycle by using multiple blades. The phase can be controlled and locked relative to an input reference signal. Since the chopper controller can also output a reference signal, one controller can be used as the reference for the second in order to accomplish this.
rajeevkini  (posted 2014-08-20 14:48:48.49)
We have a femtosecond laser which emits pulses at 1KHz repetition rate. I am looking for a chopper which can be used to block each alternate pulse. Will MC2000 do that job? Will it be possible to synchronize the chopper to the pulses & run it at 500Hz so that every alternate pulse is blocked. The laser does give a reference signal at 1KHz.
jlow  (posted 2014-08-21 10:02:18.0)
Response from Jeremy at Thorlabs: This is possible with the MC2000. We will contact you directly to discuss more about setting this up.
cdaly  (posted 2014-08-07 10:13:33.157)
Response from Chris at Thorlabs: Thank you for your inquiry. Yes, we can quote this as a custom for you. I will contact you to get this started. Future custom requests can be sent directly to us at techsupport@thorlabs.com.
akbariitm  (posted 2014-07-24 12:01:02.443)
Can we get quotation for MC2000 with MC2F57 chopper blade?
ronningent  (posted 2014-07-14 10:29:11.31)
We are using a MC1000 controller with a MC1F60 blade. At startup, when we select the type of blade installed, the code "b 60" never appears. The code "b 30" appears. Selecting it allows the blade to spin. Is the output frequency still correct even though I am not able to select the correct blade? Should the MC1000 be able to select a 60 slot blade?
cdaly  (posted 2014-08-07 04:09:23.0)
Response from Chris at Thorlabs: The MC1000 should work with the 60 slot blade and b60 should appear as a possibility. This is likely a firmware issue. In this case however the device would need be be sent back in for the update. We will contact you directly about this.
mfl  (posted 2014-06-07 14:57:57.077)
Dear staff, My name is Ming-Fu Lin from University of Illinois at Urbana-Champaign. We have MC2000 optical chopper. We would like to connect to NI Labview. do you have any specific Labview instruction/example for this device? Thanks a lot. Ming-Fu
jlow  (posted 2014-06-11 04:19:59.0)
Response from Jeremy at Thorlabs: You can do this using serial command. The is outline in Section 6 of the manual. We will contact you directly to provide more information regarding this.
patrick.rymer  (posted 2014-03-10 16:11:16.123)
Is it possible to buy custom chopper blades to go with this system? I need customized width of the open sections. Thanks - PR
cdaly  (posted 2014-03-11 05:42:21.0)
Response from Chris at Thorlabs: Yes, we have provided custom chopper blades in the past. We will contact you directly to discuss your requirements.
user  (posted 2014-02-18 10:39:32.707)
I'm using the MC2000 with the MC1F100 wheel at about 9.6 kHz (external reference), this was working fine but now the motor of the chopper seems damaged (unhealthy noise when it ramps up to high speed, doesn't lock anymore, i guess the bearings of the motor have gone bad). Can i order a replacement for just the motor or chopper part from thorlabs without buying a new controller (I didn't find this on the webpages)?
jlow  (posted 2014-02-25 03:59:03.0)
Response from Jeremy at Thorlabs: We can take the chopper head back for evaluation and repair. Since you did not leave any contact information, can you contact our RMA department (RMA@thorlabs.com) to arrange this please?
saltattam  (posted 2014-02-13 17:24:13.143)
Is there a way to see the actual frequency of the disc, and not just a reference signal which may or may not be correct? If I physically stop the disc the reference signal keeps on going. Seems like I should be able to see if it's locked in or not.
jlow  (posted 2014-02-14 11:00:21.0)
Response from Jeremy at Thorlabs: You can see the signal from the blade by selecting "Actual" as the reference out signal. With this setting, the reference out signal is obtained from the feedback sensor reading the outer slots on a chopper wheel.
hfinkenz  (posted 2014-01-08 10:47:54.44)
Dear Sir/Madam, if the motor is stopped, does the disc stop in (a) specific position(s)? We would like to run the chopper only at times during the experiment and otherwise have full transmission, without repositioning the chopper. Is there a way to achieve this automatically? Thanks in advance!
jlow  (posted 2014-01-09 04:23:39.0)
Response from Jeremy at Thorlabs: The chopper does not stop at a specific position when the drive signal is removed.
user  (posted 2013-08-17 19:24:53.73)
Is there a way to use 20X harmonics? My external ref is 10Hz, I want the MC1F10 blade (NOT other blades) to work at 200Hz. Thank you.
tcohen  (posted 2013-08-22 14:58:00.0)
Response from Tim at Thorlabs: Thank you for contacting us. You can run the MC1F10 at 200Hz using the internal reference, but if using an external reference, the current edition of the MC2000 accepts harmonic values up to a maximum of 15X.
esquin  (posted 2013-07-31 16:07:04.18)
We are looking for a possibility to modulate the intensity of a monchromatic light source by 10% to 20%. This modulation does not mean to turn on/off completely the light but a relatively small modulation. The reason is that the system relaxes on time and we cannot just turn off completely the light even for a small amount of time. It is not clear to me whether a chooper system can do exactly that upon blade. Can you send me information whether this is possible? Thank you in advance.
jlow  (posted 2013-08-01 16:27:00.0)
Response from Jeremy at Thorlabs: We will get in contact with you to discuss about your application and discuss the different possibility on achieving this.
pseudotexan  (posted 2013-06-05 11:18:19.027)
I am getting a strange problem with my chopper unit. I am using the standard 10-slot blade at 300 Hz, internally referenced. Sometimes, the blade will stop spinning, reverse direction, and then start spinning at about 260 Hz, consistently with about a 40 Hz offset for no reason. It also makes a high-pitched whine. It is unable to lock back on to the desired frequency. Sometimes, I can temporarily solve the problem by re-seating the cable to the blade housing, but it just resets a bit later.
jlow  (posted 2013-06-06 14:29:00.0)
Response from Jeremy at Thorlabs: We will get in contact with you directly on troubleshooting this and possibly sending this back for evaluation.
marco.cammarata  (posted 2013-04-24 04:14:55.51)
Do you have any idea about the damage threshold for the MC* blades for nanosecond pulses ? I would like to send a ~1W beam (few mm^2 area) on the wheel but - of course - I don't want to damage it. Thanks, marco
tcohen  (posted 2013-04-25 16:27:00.0)
Response from Tim at Thorlabs to Marco: The chopper blades are blued clock spring steel nominally .010” thick. The blade itself is not meant for high power applications but we have not tested the damage threshold with ns pulses.
dursch  (posted 2013-02-06 13:49:02.57)
Our MC200 seems to run uncontrollable, meaning the chopper is always on. I have tried updating the firmware to the newest version, but that didn't help. Any suggestions on how to remedy this problem.
jlow  (posted 2013-02-06 16:41:00.0)
Response from Jeremy at Thorlabs: We will contact you directly to troubleshoot this issue.
orich  (posted 2013-01-27 12:06:59.47)
Do you have chopper blades with duty factor smaller than 0.5. This is very useful for average smaller light intensity but with high quasi CW light intensity.
tcohen  (posted 2012-09-24 09:17:00.0)
Response from Tim at Thorlabs: Thank you for pointing this out! While we are fixing this please reference the following values: MC1F2 = 0; MC1F6 = 1; MC1F10 = 2; MC1F15 = 3; MC1F30 = 4; MC1F60 = 5; MC1F100 = 6; MC2F57 = 7
martin.fertl  (posted 2012-09-21 07:38:36.0)
To whom it may concern, in section 6.3 of the manual the command "blade=n". The number n is said to be found in section 6.5.2. But neither in the printed nor in the pdf version of the manual this section exists. Can you please add this information to the manual. Thank you very much
jlow  (posted 2012-08-27 17:12:00.0)
Response from Jeremy at Thorlabs: The maximum frequency for the REF IN is 10kHz.
schoeps  (posted 2012-08-27 12:58:41.0)
What maximum frequency is allowed as ref-in? Will I be able to use my 30kHz signal?
tcohen  (posted 2012-07-19 15:29:00.0)
Response from Tim at Thorlabs: Thank you for contacting us. The new blade was introduced around 12/2011. Devices with firmware <= 3.10 should be updated to the latest firmware to make use of phase control on the 2-slot blade. There were many improvements with this firmware update including reduced jitter to most blades. However, please note that the previous blade design is incompatible with >=3.11 firmware. To determine your edition of hardware and firmware, you can attempt to update the firmware as indicated on the “Software Downloads” tab. To determine your blade edition, you can check for the outer rim which is a characteristic of the new design. I will contact you directly to continue this conversation, but we will also make this information more visible on the web.
jcanseco  (posted 2012-07-19 16:54:29.0)
In your catalog, I saw that the MC1F2 blade was updated as follows: "Please note the MC1F2 two-slot blade has been updated to a newer version. This new blade is only compatible with units that have firmware version 3.11 and later. For all older firmware versions, the old-style blade must be used. This blade is not backwards compatible. " When was this update made? What is the better properties of this new wheel? Better phase-locking or phase stability? If I purchased a MC1F2 in 2009, is it an old-style blade? I am having a problem with the phase stability with MC1F2, while one of my colleagues does not with the same setup. I guess he bought it in 2010 or 2011. Could it be due to the update of the blade?
tcohen  (posted 2012-07-05 14:12:00.0)
Response from Tim at Thorlabs to Vasili: Thank you for contacting us! Devices with the 1.0 series of firmware must have a free hardware upgrade in order to use the new firmware. The firmware upgrader on the web will be replaced with a newer version soon. If there is any hardware incompatibility, this new version will provide this information along with instructions for inquiring about our free hardware upgrade.
vasili.savitski  (posted 2012-07-04 16:10:33.0)
Dear Sir/Madam, We have recently purchased an MC1F100 blade to use it with our MC2000 chopper driver. Unfortunately it’s appeared that there is no such blade in the menu of the driver. We tried to update the software of MC2000 to newer version available at your web site (3.11), but update failed: ”hardware allows you to update only to version 1.05”. But we were not able to update even to this 1.05 version. So, could you please help us with this issue and explain how to use the blade MC1F100 with MC2000? We haven’t been informed on your web site that this blade can only be used only with the certain version of the software and therefore believe that this issue should be solved by you. Best regards, Vasili.
bdada  (posted 2012-03-27 13:07:00.0)
Response from Buki at Thorlabs to customers that have experienced problems installing drivers: One common reason driver installations fail is because users do not have administrative privileges. Administrative privileges allow users to modify essential software in the computer. Starting with Windows Vista, programs which require administrative access to a user's machine must also first ask for and receive approval through the "User Account Control" dialog. Starting with Windows Vista, users will typically receive a notification of failure when a program requests but does not receive administrative access. In some cases (and especially on Windows XP), these programs will "silently fail" - that is, the program will fail to properly execute but users will not be notified. If you have problems installing a driver, please verify you have administrative rights and then try installing it again. Please contact TechSupport@thorlabs.com if you have any questions.
bdada  (posted 2012-03-13 11:41:00.0)
Response from Buki at Thorlabs to chong.li: Thank you for your feedback. We are working on providing more guidance on our website regarding this issue. To confirm the drivers have been properly installed, we would like you to use HyperTerminal to test if you can communicate with the MC2000. Note that Hyper Terminal is only available on Windows Operating Systems older than Windows 7. We have sent you instructions for how to set up the HyperTerminal and test the MC2000. Thank you again for your feedback. We have contacted you with more information and will provide more information here soon.
chong.li  (posted 2012-03-09 05:30:50.0)
Hi There, I believe I have successfully installed the USB driver in my laptop but there isn't any response when I connect the USB cable from the powered-on chopper controller to my laptop. Can you please suggest any solutions? Thanks!
chong.li  (posted 2012-03-08 06:07:54.0)
Hi there, I have suffered the same problem as pavulurisumanth did. Can you please post the solution to the public instead contact individuals in order to save any followers time? Many thanks!
bdada  (posted 2011-11-14 23:46:00.0)
Response from Buki at Thorlabs: Thank you for your feedback. We have contacted you to troubleshoot the problem.
pavulurisumanth  (posted 2011-11-12 16:08:56.0)
Hi, I have a similar problem as for "zhoujw321". The USB driers do not install and and after MC2000 is attached to the PC, I couldnt see any response. Could you help me to solve this problem? Thank you.
bdada  (posted 2011-08-23 12:43:00.0)
Response from Buki at Thorlabs: Thank you very much for your feedback. Unfortunately, the REF OUT cannot be set to other frequencies. The possible options are listed on Page 10 of the manual: http://www.thorlabs.com/Thorcat/18400/18488-D02.pdf Please contact TechSupport@thorlabs.com if you have further questions or wish to discuss your application.
tomy  (posted 2011-08-23 10:25:38.0)
Dear Sir,Mme It is possible while spinning the chopper blade at a frequency f to set the REF OUTPUT signal to other frequency as reference signal for lock-in detection, for example 2f or 5f?
bdada  (posted 2011-08-22 18:34:00.0)
Response from Buki at Thorlabs: Thank you for your feedback. We have contacted you to set up a return of your unit for an upgrade.
jkim5  (posted 2011-08-22 11:44:43.0)
I have a problem when running MC2000 with MC1F2 wheel. When I run at a low frequency, for example, at 4 Hz, the jitter is huge (with the standard deviation in the display at 1.5 Hz). It becomes worse when I raise the chopper frequency with the standard deviation reaching up to 10 Hz at 25 Hz. As an effort to fix this problem, I tried to upgrade the firmware, but it does not improve. BTW, the firmware version I could upgrade to was 1.03. How can I upgrade to higher version of firmware? Do I have ship the unit back to Thorlabs, as written in the software downloads? If thats the case, I need to rent a demo version, otherwise my experiment have to be stopped.
bdada  (posted 2011-07-28 20:03:00.0)
Response from Buki at Thorlabs: Thank you for your feedback. We ran your setup here at Thorlabs and found the same issue. We believe this could be a firmware problem with the PID settings and are currently working to resolve this. To optimize the motor to the console at this frequency, returning the unit may be advisable. In any case, a software upgrade will probably be required. Please contact TechSupport@thorlabs.com with any questions.
gerald.auboeck  (posted 2011-07-26 21:09:18.0)
Hi. I just bought a MC2000 together with a MC1F100 blade for chopping at high frequencies. I need to chop a beam phase locked to an external reference at about 9.5 KHz. However, locking does not work (the controller says it is locked, but watching the reference signal directly and the actual output of the chopper it is clearly not). When I try for testing to lock at about 5kHz it locks but has a huge jitter (~10°) and goes out of lock every now and then. I would need this running quite urgently so it would be great if this can be solved fastly, Gerald
jjurado  (posted 2011-06-16 08:39:00.0)
Response from Javier at Thorlabs to alsturl: The PLL locks to the rising edge of the external reference signal when the chopper is driven in external reference mode. Please contact us at techsupport@thorlabs.com if you have any further questions or comments.
alsturl  (posted 2011-06-10 16:50:43.0)
Hi. Does the PLL lock to the rising edge or the falling edge of an external reference TTL signal? Thanks in advance.
jjurado  (posted 2011-05-26 18:14:00.0)
Response from Javier at Thorlabs to : kudayakumar85: Thank you very much for contacting us with your request. Here are my comments: (1) Manufacturing a custom blade - This would require a modification to the control software and firmware of the controller. I will contact you directly to discuss this a bit further. (2) Chopping a 1 cm diameter beam - One possible solution is to use an optical relay system to reduce and re-expand the beam. (3) Using a chopper wheel from a different company - The same answer as (1) applies. I will get in touch with you to discuss your application.
kudayakumar85  (posted 2011-05-26 04:36:47.0)
Hi I am going to purchase MC2000 optical chopper. For nonlinear operation you have 5/7 blade.But i need to chop the light with high frequency in kHz range.Can i get custom built blade from your company? 2. If i want to chop the 1cm dia light beam,at maximum up to what frequency can i chop. Is there any formula available to calculate relating diameter of the beam and frequency of chop. 3. And also i am having chopper blade of 30(outer)/3(inner)blade from perkin elmer company which we bought long ago. shall i use it with your optical chopper mc2000. 4. We have lockin amplifier also to sync the signal with optical chopper model. Thank you regards Udayakumar k
bdada  (posted 2011-04-29 15:22:00.0)
Response from Buki at Thorlabs: Thank you very much for your feedback. We have contacted you to troubleshoot the issue.
zhoujw321  (posted 2011-04-28 15:20:03.0)
Hi, I have some trouble with installing the USB driver. When I had inserted the CD and installed drivers, there were no onscreen prompts that I could follow. After the MCLS was attached to the PC, I couldnt see any respond. Could you help me solve this problem? Thank you.
bdada  (posted 2011-03-07 13:06:00.0)
Response from Buki: Thank you for your feedback, Alex. We are currently testing a new software version for the MC2000 that will resolve the phase control issue and improve the jitter. When you stop scrolling through the menus, the unit will relock with a consistent phase. The firmware will be field upgradable and will not require the unit to come back to Thorlabs. We will contact you shortly with the expected availability of the new software.
alex.barker  (posted 2011-03-06 23:37:25.0)
Hi, Im having trouble with the MC1F2 blade. I want to lock to an external ref (~60 Hz say), with N=1 & D=2 so that the chopping freq = 30Hz, with an adjustable phase offset. I then want to lock other instruments to the 30Hz signal. This is working wonderfully with the MC1F10 blade, using the "target out" reference. However, using the MC1F2 (and "Inner ref out") the lock exhibits a lot of jitter, and the phase control has no effect. In fact, simply scrolling through menus has the effect of making the phase of the blades move around, locking to a random phase once I stop scrolling through the menus. Firmware is up to date. I would love it if you could provide any useful advice! Thanks, Alex
tor  (posted 2010-12-13 13:40:00.0)
Response from Tor at Thorlabs to Phil: We believe that this difficulty may result from adding a space between the "I" command and the desired frequency. For example, to set the frequency to 200, you should send I200, not I 200.
phillip.springer  (posted 2010-12-09 08:03:12.0)
Hi. Im having trouble with the MC1000A Chopper. Which command do I have to send via serial port to set, for example, the internal frequency? By sending R via VISA the motor starts and stops like it should. But with command I 200 it does not set the internal frequency to 200Hz. The manual is not very helpful with that. Regards, Phil
apalmentieri  (posted 2009-12-28 09:44:44.0)
A response from Adam at Thorlabs: The MC2000 internal frequency command can be controlled directly by Labview, using the RS232 ASCII commands. To set the frequency you can use the command, Set Frequency(syntax: freq=n), which will set the desired internal frequency. All of the commands can be found on page 15 of the manual. I will send you the list of commands via email as well.
letter  (posted 2009-12-27 21:32:56.0)
Hi. Can I directly control an internal frequency of this MC2000 with using the "LabVIEW"? Moreover, is the firmware update completed? I could see a story about the way to know the real frequency from posted comments below. I am waiting for your response. Regards, lukas.
jens  (posted 2009-11-30 08:45:17.0)
A reply from Jens at Thorlabs: the delay does not indicate any issue. The message was used during the testing phase and does not provide any meaningful information at this point anymore. It will be removed in the new firmware version. Sorry for the confusion this message caused.
piotr.wojtczuk  (posted 2009-11-26 05:16:45.0)
Hi, Thanks for a prompt response. Only after posting the message did I realise that the S:... messages are followed by Locked/Not Locked info. Is it normal for these messages to appear after a considerable delay? It usually takes about 5 - 10 of these s:... messages to obtain the lock/no lock information. Can this indicate a problem with the controller?
jens  (posted 2009-11-25 19:36:58.0)
A reply from Jens at Thorlabs: you are right that it is currently not possible to access the feedback frequency. Our development team is however in the process of releasing a new firmware version and based on your feedback they will include this feature. The "S:300,200" message was used by the programers for internal testing purposes, it will be removed with the update. As soon as the new version is available I will contact you, the update can be done easily at your side by uploading the new version via USB.
piotr.wojtczuk  (posted 2009-11-25 16:10:19.0)
Hi, When working with internal reference, is there any possibility to read the feedback frequency (rather than internal reference frequency) on the USB interface? I have been trying to achieve this, but there is no way I can redirect the actual frequency to be output via freq or input command. It would be useful, as I would like to know, when the frequency has stabilised after it has been set. Also I was not able to find any reference to the regular output from the chopper like: "S: 300, 200". Could you explain this to me? Regards, Piotr
klee  (posted 2009-10-09 17:57:40.0)
A reponse from Ken at Thorlabs to orich: Thank you for your feedback. Your suggestion has been forwarded to our engineering group for consideration.
orich  (posted 2009-10-08 16:03:07.0)
I am interested in having an optical chopper blade with dual frequency, higher than that of the 7/5 blade. The 60/53 blade offered by Scitec is ideal. What are the prospects of getting such blades from Thorlabs. Best wishes Ori
klee  (posted 2009-10-05 14:44:10.0)
A response from Ken at Thorlabs: Thank you for pointing out the mistake. It will be corrected shortly.
invalid  (posted 2009-10-05 13:59:22.0)
Units for impedance are displayed incorrectly; input, output impedance are not measured in "W".
Tyler  (posted 2009-03-10 08:30:26.0)
A response from Tyler at Thorlabs to H. Deuser: I forwarded your drawing request to our tech support department. They will be in contact with you later today. If we can help in any other way, please let us know.
hannes.deuser  (posted 2009-03-09 16:57:05.0)
Dear Sir or Madame, some time ago we purchased a MC1000A Chopper system. Now we would like to have, in addition to the existing drawings on your wepage, a technical drwaing of driving(controlling unit of this chopper system (parasolid or step). Thank you best regards, H. Deuser - ISC Konstanz
Greg  (posted 2009-01-29 17:15:25.0)
A response from Greg at Thorlabs to M.Justus: Your MC100A needs to be recalibrated in order to perform properly. The unit should stay locked when you change N and D. Please check your e-mail so that we can proceed to get your unit working properly.
M.Justus  (posted 2009-01-27 10:27:52.0)
We experience locking problems for external synchronization. Our current Setup: MC1000A with Blade MC1F30, external frequency 800Hz from another PLL. If we use N/D=1/1 no problem, but any other divider ratio is unstable (unlocking every few seconds), especially odd values. Do you have lab experience which reference phase jitter can be tolerated at what frequency and divider ratio?
Laurie  (posted 2008-09-10 16:52:02.0)
Response from Laurie at Thorlabs to lighthonr: The optical head assembly for the MC1000A can be purchased (Item MC1000A-ASSY5). Someone from our technical support staff will contact you shortly with current pricing information.
lighthonr  (posted 2008-09-09 19:14:44.0)
I was wondering what is the price for the choppers motor only? I have the chopper controller but the motor has been damaged beyond repair. Thanks!
rbladek  (posted 2008-04-01 10:24:20.0)
To nees: Thank you for your post concerning the excessive phase jitter you are experiencing. Our engineer has been in contact with Fairchild Semiconductor, the manufacturer of the optical sensor, and have found that the sensor uses a Si detector with filter optimized for 880 – 940nm. In your case, we suspect the light level is high enough that the filter is not completely blocking the interference causing the jitter. Si detectors generally have a response from 400 to 1100nm with the peak response approximately 980nm. We have updated the operating manual with the above specifications and some mounting instructions to help limit this.
technicalmarketing  (posted 2008-03-05 08:17:42.0)
To nees: Thank you for your suggestions for nother version of our MC1000A. We have passed those along to our electronics business unit for consideration. We always enjoy hearing about new product suggestions and ways to improve or expand our current product line.
nees  (posted 2008-03-04 14:39:45.0)
The MC1000A produces significant jitter when I chop my 1kHz Ti:sapphire laser (1Watt of 1mJ 200fs pulses at 775nm with a 15nm bandwidth). If the head is placed forward the locking circuit fails. If I reverse the direction, it locks, but with +/-2 to 3 degrees jitter. When I look through the blades stroboscopically the jitter is less than 1 degree. So the 780nm light must be contaminating the sensor. Are there equivalent interrupt sensors at 950nm, like home remotes, with long-pass blinding filters built in? No luck getting specs at Fairchild... --John
larauz  (posted 2007-07-27 14:22:36.0)
the MC1000A does not have a drawing. Also in general there is only the diagram of the blade but not of the complete system (as it is in the catalog page), therefore i can not see what plate type of plate is the chopper mounted on, distance between the plate slots, etc.

光チョッパーシステム

  • 高調波、サブ高調波、分数調波のチョッピング
  • 和分および差分リファレンス出力
  • 10スロットブレード(MC1F10HP、下記掲載)付属

他社ブレードとの適合性
MC2000Bは、他社製のブレードにも対応しています。Scitec Instrument社製のブレード(300D3/30、300D8/60、300D4/7、300D53/60)にも対応していますが、わずかに設計が異なるため、全ての機能を使用することはできません。当社は、他社製ブレードと当社のチョッパーヘッドの互換性は保証いたしません。MC2000Bと他社製ブレードを使用することで故障が生じる可能性がございます。予めご了承ください。

MC2000Bには日本国内用の電源コードが付属します。MC2000Bはミリ規格のブレッドボードに固定が可能です。

+1 数量 資料 型番 - インチ規格 定価(税抜) 出荷予定日
MC2000B Support Documentation
MC2000B光チョッパーシステム、10/100スロットブレード(36°)MC1F10HP付き、100 VAC (日本国内向け)
¥168,107
Today
+1 数量 資料 型番 - ミリ規格 定価(税抜) 出荷予定日
MC2000B-EC Support Documentation
MC2000B-EC光チョッパーシステム、10/100スロットブレード(36°)MC1F10HP付き、230 VAC(ヨーロッパ向け)
¥168,107
5-8 Days

光チョッパーブレード、シングルまたはデュアル周波数

  • シングル周波数ブレード:4 Hz~10 kHzチョッピング用途向け
  • デュアル周波数ブレードMC1F10HPは10&100スロット(チョッパーシステムMC2000Bに付属)
  • 10スロットブレードMC1F10Aのデューティサイクルは調整可能
  • 26.1 mmまでのビーム径に対応
  • 厚さ0.25 mmのブルーイング処理済みクロックスプリングスチール製

これらのブレードにより、光チョッパMC2000Bのチョッピング周波数の範囲が拡張できます。高精密デュアル周波数ブレードMC1F10HPはMC2000Bに付属するブレードです。当社の高精密ブレード(型番MC1F10HP、MC1F2ならびにMC1F2P10)は、低ジッタで安定した周波数チョッピングを行います(詳細は「仕様」タブをご覧ください)。コントローラは高精密ブレードの外側のスロットをトラッキングすることによりこの安定性を得ています。

10スロットブレードMC1F10Aは2枚のディスクで構成されており、デューティサイクルの調整が可能です。ディスクは、刻印されている点に合わせ前向きに光学ヘッドに取り付けられています。デューティサイクルを所望の値(0~50%の間)に調整後、取付けネジを締め付けてください。

なお、当社の旧製品MC2000用に販売されているブレードはMC2F57を除きすべてMC2000Bに取り付け可能です。MC2F57の代替品はMC2F57Bとなります(詳細は下記の高調波ブレードをご覧ください)。

Product Photo
(Click to Enlarge)
MC1F10HPMC1F2MC1F2P10MC1F6P10MC1F10MC1F10AMC1F15MC1F30MC1F60MC1F100
Item #MC1F10HPaMC1F2bMC1F2P10bMC1F6P10MC1F10MC1F10AcMC1F15MC1F30MC1F60MC1F100
Slots10, 1002261010153060100
Duty Cycle50%10%50%0 - 50%c50%
Frequency20 - 1000 Hz,
200 Hz - 10 kHz
4 - 200 Hz4 - 200 Hz12 - 600 Hz20 - 1000 Hz20 - 1000 Hz30 - 1500 Hz60 - 3000 Hz120 - 6000 Hz200 Hz - 10 kHz
Compatible
Chopper Systemd
MC2000BMC2000B
MC2000
MC2000BMC2000BMC2000B
MC2000
MC2000BMC2000B
MC2000
MC2000B
MC2000
MC2000B
MC2000
MC2000B
MC2000
Laser Beam Diametere
Max. Outsidef1.36 mmg
(0.053")
N/A11.68 mm
(0.460")
4.19 mm
(0.165")
13.23 mm
(0.521")
12.73 mmc
(0.501")
9.25 mm
(0.364")
4.86 mm
(0.191")
2.49 mm
(0.098")
1.51 mm
(0.06")
Max. Centerh10.32 mm
(0.406")
26.10 mm
(1.028")
9.42 mm
(0.371")
2.77 mm
(0.109")
10.32 mm
(0.406")
10.03 mmc
(0.395")
6.90 mm
(0.272")
3.45 mm
(0.136")
1.73 mm
(0.068")
1.04 mm
(0.04")
Max. Insidei6.34 mm
(0.249")
N/A6.35 mm
(0.250")
1.17 mm
(0.046")
6.34 mm
(0.249")
6.32 mmc
(0.249")
3.99 mm
(0.157")
1.89 mm
(0.074")
0.92 mm
(0.036")
0.55 mm
(0.02")
  • 光チョッパーシステムMC2000BにはブレードMC1F10HPが1つ付属します。この高精密ブレードは、10 kHzまで低ジッタで安定した周波数チョッピングを行います。ブレードには光同期用の100個のスロットが外側にありますが、チョッピングの目的でも使用可能です。
  • こちらの高精密ブレードは200 Hzまで低ジッタで安定した周波数チョッピングを行います。ブレードには同期用に100個の小さいスロットが外側にあります。
  • 10スロットブレードMC1F10Aのデューティサイクルは0%~50%の間で調整可能です。最大ビーム径は設定したデューティサイクルによって異なります。
  • 当社の旧製品光チョッパーシステムMC2000に取り付け可能かどうかがご覧いただけます。
  • ブレードが回転する際の信号のON/OFFの遷移時間を最小限にするためには、ビームをチョッパーブレードのスロットの1番幅広い位置に集光させる必要があります。
  • チョッパーホイールスロットの1番幅広い位置を通る最大ビーム径。右の図の赤い丸印。
  • デュアル周波数ブレードMC1F10HPの100スロットを通る最大ビーム径。
  • チョッパーホイールスロットの中央を通る最大ビーム径。右の図の緑の丸印。
  • チョッパーホイールスロットの1番狭い位置を通る最大ビーム径。右の図の青い丸印。
Spot Size Reference Drawing
Click to Enlarge

スポットサイズ参考図
+1 数量 資料 型番 - ユニバーサル規格 定価(税抜) 出荷予定日
MC1F10HP Support Documentation
MC1F10HP光チョッパ用10&100スロットデュアル周波数ブレード、20 Hz~10 kHz、高精密
¥6,471
5-8 Days
MC1F2 Support Documentation
MC1F2光チョッパ用2スロットブレード、4~200 Hz
¥8,476
Today
MC1F2P10 Support Documentation
MC1F2P10光チョッパ用2スロットブレード、4~200 Hz、高精密
¥6,471
Today
MC1F6P10 Support Documentation
MC1F6P10光チョッパ用6スロットブレード、12~600 Hz
¥6,471
5-8 Days
MC1F10 Support Documentation
MC1F10光チョッパ用10スロットブレード、20~1000 Hz
¥6,015
Today
MC1F10A Support Documentation
MC1F10A光チョッパ用10スロットブレード、20~1000 Hz、デューティサイクル調整可能
¥8,616
Today
MC1F15 Support Documentation
MC1F15光チョッパ用15スロットブレード、 30~1500 Hz
¥6,015
Today
MC1F30 Support Documentation
MC1F30光チョッパ用30スロットブレード、60~3000 Hz
¥6,015
5-8 Days
MC1F60 Support Documentation
MC1F60光チョッパ用60スロットブレード、120~6000 Hz
¥6,015
5-8 Days
MC1F100 Support Documentation
MC1F100光チョッパ用100スロットブレード、200Hz~10 kHz
¥6,577
Today

光チョッパーブレード、高調波

  • レシオメトリックや励起プローブ実験用に便利
  • ブレードは8 Hz~6 kHzのチョッピング用途向け
  • 14.66 mmまでのビーム径に対応
  • 厚さ0.25 mmのブルーイング処理済みクロックスプリングスチール製

こちらの高調波ブレードには内側と外側に2種類のスロットがあり、単一ビームを分岐させ、個々に変調することが可能です。詳細については「動作」タブをご参照ください。当社のブレードは厚さ0.25 mmのブルーイング処理済みクロックスプリングスチール製です。こちらのブレードは当社旧製品の光チョッパMC2000には対応しておりません。

Product Photo
(Click to Enlarge)
MC2F47MC2F57BMC2F330MC2F860MC2F5360
Item #MC2F47MC2F57BaMC2F330MC2F860MC2F5360
SlotsInner 453853
Outer 77306060
Duty Cycle50%
FrequencyInner8 - 400 Hz10 - 500 Hz6 - 300 Hz16 - 800 Hz106 - 5300 Hz
Outer14 - 700 Hz14 - 700 Hz60 - 3000 Hz120 - 6000 Hz120 - 6000 Hz
Laser Beam Diameter
Max. Beam DiameterInner14.66 mm (0.577")14.35 mm (0.565")14.66 mm (0.577”)9.53 mm (0.375”)1.45 mm (0.057”)
Outer13.97 mm (0.550")14.96 mm (0.589")4.19 mm (0.165”)2.08 mm (0.082”)2.08 mm (0.082”)
  • ブレードMC2F57Bは光チョッパMC2000Bのみに取り付け可能です。旧製品のブレードMC2F57は旧製品の光チョッパMC2000のみに対応します。
+1 数量 資料 型番 - ユニバーサル規格 定価(税抜) 出荷予定日
MC2F47 Support Documentation
MC2F47光チョッパ用デュアル周波数ブレード、内側4スロット&外側7スロット
¥6,471
5-8 Days
MC2F57B Support Documentation
MC2F57B光チョッパ用デュアル周波数ブレード、内側5スロット&外側7スロット
¥6,471
5-8 Days
MC2F330 Support Documentation
MC2F330光チョッパ用デュアル周波数ブレード、内側3スロット&外側30スロット
¥6,471
5-8 Days
MC2F860 Support Documentation
MC2F860光チョッパ用デュアル周波数ブレード、内側8スロット&外側60スロット
¥6,471
5-8 Days
MC2F5360 Support Documentation
MC2F5360光チョッパ用デュアル周波数ブレード、内側53スロット&外側60スロット
¥6,471
5-8 Days
ログイン  |   マイアカウント  |   Contacts  |   Careers  |   個人情報保護方針  |   ホーム  |   FAQ  |   Site Index
Regional Websites:East Coast US | West Coast US | Europe | Asia | China
Copyright © 1999-2021 Thorlabs, Inc.
Sales: +81-3-6915-7701
Tech Supports: +81-3-6915-7701


High Quality Thorlabs Logo 1000px:Save this Image