• Broadband Emission from Visible to NIR
  • SM2-Threaded Housing for Compatibility with Ø2" Lens Tubes
  • Post Mountable for Quick and Simple Integration



Replacement Bulb

Connects to Included
Power Supply

Application Idea

SM2T2 Lens Tube Coupler
Attaching QTH10 Lamp to
LCFW5 Filter Wheel

Related Items

Please Wait


当社のタングステンハロゲンランプは、アライメント、テスト、照明等の一般的な用途の光源です。 ヒートシンク内蔵のØ55.9 mmのコンパクトな筐体に納められており、両端にはØ50 mm~Ø50.8 mm(Ø2インチ)レンズチューブアクセサリを直接取り付けられるSM2内ネジ、また、底部にはØ12 mm~Ø12.7 mm(Ø1/2インチ)ポストを取付けられるM4タップ穴も付いています。

可視ならびに近赤外の波長範囲で広帯域に発光する(「仕様」タブのグラフ参照)このインコヒーレント光源は、様々な光学系のセットアップにおける、レーザ光を使用せずに行うアライメントに適しています。 CCD分光器と組み合わせて使用し、レンズフィルタほか光学素子の特性確認に使用することもできます。

この白色ランプはすぐにご使用できるようSM2外ネジ付きエンドキャップが2個と、コンデンサーレンズ(型番ACL5040U)を取り付けた状態で発送します。コンデンサーレンズは、固定リングSM2RRでSM2レンズチューブに取り付けてあります。前面のキャップは手で取り外しやすいように刻み目が付いています。一方、背面のキャップはスパナレンチSPW909もしくはSPW801(別売り)で取り外すことができます。背面のキャップを外すと付属の0.05インチ六角レンチに対応する止めネジが見えます。この止めネジでライトバルブのレセプタクルを調節できるため、コンデンサーレンズやその他の光学素子を外すことなく、画質や集光具合を調整することが可能です。 レセプタクルの垂直方向の調整範囲は3.8 mmです。交換用バルブ(型番QTH10B)については、下記をご参照ください。



Optical Output Powera50 mW (Typical)
Bulb TypeQuartz Tungsten-Halogen Bulbb
Color Temperature2800 K (Typical)c
Lifetime2000 Hours
Bulb Voltage12 VDC
Bulb Power10 W
Bulb SocketG4 2-Pin Baseb
Included Power SupplyInput: 90 - 264 VAC, 50 - 60 Hz
Output: 12 VDC
Output Connector: 2.1 mm ID x 5.5 mm OD x 9.5 mm Long (Female)
  • コンデンサーレンズACL5040Uからの出射光をサーマルパワーセンサ(保護膜付き銀コーティング、反射焦点距離(RFL)152.4 mmのØ50.8 mm(Ø2インチ)90°軸外放物面ミラー付き)に集光して測定。
  • ライトバルブを交換する際には、ガラスに皮脂が付着しないよう手袋(光学用ラテックス製手袋および綿手袋等)をお使いになることをお勧めします。 ライトバルブに汚れが付着している場合には、電源を接続する前にアルコールで汚れを落としてください。
  • 色温度は典型値でユニットにより異なります。
Drawing of Lamp
Click for Details


Posted Comments:
Gemma Piquero  (posted 2021-09-13 06:02:41.993)
Good morning. Could you please provide me with the intensity vs. wavelength curve in this source? Thanking in advance. Best regards, Gemma
YLohia  (posted 2021-09-14 03:43:55.0)
Hello, thank you for contacting Thorlabs. The emission spectrum can be requested by emailing techsupport@thorlabs.com. The spectrum should resemble that of a black body due to it being a Quartz Tungsten-Halogen source. I will reach out to you directly with preliminary testing done on a QTH10 lamp.
Elsayed Zahran  (posted 2021-03-05 18:13:48.18)
Hello, I have the QTH10 as part of the Solarlab XM system. Can it be controlled by the DC2100? How can I install it into the ThorLabs optical bench? Thanks, Elsayed
YLohia  (posted 2021-03-12 04:02:45.0)
Hello, the QTH10 is not intended to be controlled via the DC2100. Please use the included 12 VDC power adapter for this lamp. You can mount the QTH10 on a standard optical breadboard with 1/4"-20 tapped holes using a 1/2" post holder (for eg, PH2), 1/2" post (for eg, TR2), SM2T2 (SM2 coupler), and LMR2 mount.
Serdar Okuyucu  (posted 2021-02-03 20:53:31.42)
Hello, I have the QTH10/M lamp which I would like to use for the calibration of a device response. Could you please provide the emission spectra of the QTH10/M? Thank you.
YLohia  (posted 2021-02-03 04:36:19.0)
Hello, thank you for contacting Thorlabs. The emission spectrum can be requested by emailing techsupport@thorlabs.com. The spectrum should resemble that of a black body due to it being a Quartz Tungsten-Halogen source. I will reach out to you directly with preliminary testing done on a QTH10 lamp.
user  (posted 2020-06-18 14:04:22.933)
Hello, Could you please provide me the emission spectra of the QTH10? Thank you
YLohia  (posted 2020-06-22 09:50:48.0)
Hello, thank you for contacting Thorlabs. We will reach out to you directly with this information.
Brian Wood  (posted 2020-05-08 15:21:55.193)
Hello, Can you provide me with the emission spectra of the QTH10 product? Also, can the installed lens be swapped for another one? Thank You
YLohia  (posted 2020-05-12 09:19:04.0)
Hello, thank you for contacting Thorlabs. The spectrum should resemble that of a black body due to it being a Quartz Tungsten-Halogen source. I will reach out to you directly with preliminary testing done on a QTH10 lamp. The included lens (ACL5040U) is mounted in an SM2 lens tube and is secured using the SM2RR retaining ring. This can be removed using the appropriate spanner wrench and replaced with another 2" OD optic.
Anjana Heva  (posted 2020-02-27 09:01:13.387)
Hello, I am looking for the emission spectrum of your quartz tungsten halogen lamp (QTH10) Thank you, Anjana Heva
llamb  (posted 2020-02-27 01:55:09.0)
Hello Anjana, I will reach out to you directly with this information.
JuanCarlos Martinez-Anton  (posted 2020-02-10 10:01:01.683)
I need to know if the QTH lamps have no UV-filter as typically found for illumination purposes. Although not high, I need the small UV portion spectrum and therefore a clean quartz envelope (without UV-filter) Can you help to solve this doubt? thanks!
llamb  (posted 2020-02-10 04:56:06.0)
Thank you for your feedback. The QTH10(/M) lamps do not feature any UV filters, just an uncoated B270 aspheric condenser lens, for which you can find a sample transmission spectrum here: https://www.thorlabs.com/images/TabImages/Uncoated_B270_Transmission_780.gif.
user  (posted 2020-02-07 04:21:03.613)
Dear Thorlabs team, I'm looking for the emission spectrum, could you provide me with such an information, please? thank you, regards, Anna
YLohia  (posted 2020-02-07 11:40:23.0)
Hello Anna, I have reached out to you with this information.
user  (posted 2019-05-07 06:04:17.817)
Hi, I am interested in your QTH10/M Quartz Tungsten-halogen Lamp so I can calibrate a spectrofluorometer. However, to do this I will need the bulbs original emission spectrum/Power irradiance spectrum, can you please provide this? Cheers, Callum J
YLohia  (posted 2019-05-07 11:27:40.0)
Hello Callum, I have reached out to you directly with this information.
josh josh  (posted 2019-04-24 05:46:22.857)
Buechtemann mentioned "The spectrum supplied via graph and Excel sheet has its maximum at 621 nm". However, I cannot seem to find a spectrum of this Quartz Tungsten-Halogen Lamp on the website.
YLohia  (posted 2019-04-24 09:37:52.0)
Hello, due to the previous feedback, we noticed a discrepancy between the expected spectrum and the spectrum we had on the website. We have removed that plot until we have completed further testing across various batches.
buechtemann  (posted 2018-04-09 11:36:21.217)
The Specs indicate a color temperature of 2800 K. This number implies a maximum . of the spectral radiance at app. 1000nm. On the other hand: The spectrum supplied via graph and Excel sheet has its maximum at 621 nm. This implies a color temperature of 4666 K. This is a vast dicrepancy. Please explain
llamb  (posted 2018-07-10 09:07:02.0)
Thank you for your feedback and for pointing out this discrepancy. We are looking to update the expected Spectrum after additional testing, as the current plot of the spectrum does not match the bulb's specs. The spectrum should resemble that of a black body due to it being a Quartz Tungsten-Halogen source. I will reach out to you directly with preliminary testing done on a QTH10 lamp.
user  (posted 2018-02-13 18:57:48.7)
Is there a switch on this lamp to turn it on/off or do you just unplug/plug the connector in to turn it off/on?
tfrisch  (posted 2018-03-22 02:53:00.0)
Hello, thank you for contacting Thorlabs. This lamp is controlled just by connecting it to its power supply.
sareggeti  (posted 2018-02-06 13:35:59.6)
Can this product be used as a blackbody calibration source as a 2800K temperature blackbody? Wavelengths of interest are 550nm and 650nm. With the stabilized tungsten light source (SLS201L), a plot of spectral power distribution compared to a true blackbody is provided. Is this data available for the QTH10 light source? Thanks for your help.
tfrisch  (posted 2018-03-22 02:44:28.0)
Hello, thank you for contacting Thorlabs. QTH10 does not have a feedback loop in order o stabilize the output, so if you need a blackbody source for calibration, it will not be suitable. Whether it would be suitable as an approximation would depend entirely on the tolerances of your application, but we would not be able to guarantee it against any NIST-traceable or similar standard. I will reach out to you directly to discuss your application.
daniel.o-connor  (posted 2017-12-05 13:52:19.2)
The manual safety section states the following: "Always wear eye protection when working with the lamp." Can you recommend what we should use for eye protection with this product?
nbayconich  (posted 2017-12-28 04:43:32.0)
Thank you for your feedback. For liability reasons, please verify all laser goggle selections with your local laser safety office who would have access to the complete specs of this light source and how it will be used in your application. IR blocking glasses will be most suitable for this type of light source. I will reach out to you directly about your application.
bekker  (posted 2016-02-18 15:55:50.837)
Dear Thorlabs, how reliable is the provided spectrum? I'm considering to use the lamp as an intensity calibration source for a CCD. The absolute amount of light power is not so interesting for me, the relative power versus wavelength should be known with a few percent precision though.
besembeson  (posted 2016-03-09 01:51:09.0)
Response from Bweh at Thorlabs USA: This can be used for such an application. I will follow-up with you regarding the percentage fluctuations of the relative intensity with wavelength. However, it seems to me your application might benefit from a broadband stabilized source instead like the ones at the following link: http://www.thorlabs.com/newgrouppage9.cfm?objectgroup_ID=7269
napoleondor  (posted 2015-12-17 18:17:46.66)
Hello, I want to exact a connector type. I'd read in specification about strange inner diameter: "Output Connector: 1 mm ID x 5.5 mm OD x 9.5 mm Long (Female)". It seems that an inner diameter (1 mm) of this connector not corresponding picture of QTH10/M. What inner diameter is correct? Nikolay Brysin
besembeson  (posted 2015-12-21 03:06:02.0)
Response from Bweh at Thorlabs USA: Thanks for pointing that out. The power supply connector barrel plug is actually 2.1mm ID x 5.5mm OD x 9.5mm Long (female). We are going to correct this on our website please.


Broadband Light Source Selection Guide
Item #(Click to
Not to Scale)
Emitter TypeWavelength
(Click for Plot)
Output CouplingOutput PowerBulb
SLS204Deuterium200 - 700 nmFree Space or
Fiber Coupled (SMA)
2 mWa
0.1 mWb
30 WN/A2000 hcSLS254B
SLS205Xenon Arc240 - 1200 nmFree Space or
Fiber Coupled (SMA)
290 mWa
5.5 mWd
75 W5800 Ka
5400 Kd
2000 hcSLS255B
SLS401Xenon Arc240 - 2400 nmFree Spacee>1.3 Wa150 W5800 K2000 hcSLS401Bf
or SLS402B
SLS402Mercury-Xenon Arc240 - 2400 nmFree Spacee>1.3 Wa150 W6000 K2000 hcSLS401B
or SLS402Bf
360 - 2500 nmFree Spacee>10 Wa150 W3400 K1000 hgSLS301B
360 - 2600 nmFree Spacee or
Fiber Coupled (SMA)
500 mWa
10 mWh
9 W2796 K10 000 hSLS251
360 - 3800 nmFree Spacee>1.6 Wa150 W3400 K1000 hgSLS301B
400 - 1600 nm
Fiber Bundle1.4 Wi150 W3200 K1000 hcOSL2Bf,
400 - 1750 nm
Fiber Bundle3.8 Wi150 W3200 K200 hcOSL2B,
400 - 2200 nmFree Space50 mW (Typ.)10 W2800 Kj (Typ.)2000 hQTH10B
SLS202L(/M)Tungsten450 nm - 5.5 µmFree Spacee or
Fiber Coupled (SMA)
700 mWa
1.5 mWk
7.2 W1900 K10 000 hSLS252
SLS203L(/M)Silicon Carbide Globar500 nm - 9 µmFree Space>1.5 Wa24 W1500 K10 000 hSLS253
SLS303Silicon Nitride Globar550 nm - 15 µmFree Space4.5 Wa70 W1200 K5000 hgSLS303B
  • アダプタ無し、ライトバルブの使用開始直後測定された自由空間への光出力パワー 
  • ライトバルブの使用開始直後、耐ソラリゼーションパッチケーブルM114L01を接続して測定
  • 最大出力光パワーが使用開始時の50%に低下するまでの合計動作時間 
  • ライトバルブの使用開始直後、耐ソラリゼーションパッチケーブルM114L01を接続して測定
  • 自由空間出力を液体ライトガイド(LLG)に結合するアダプタ(別売り)をご用意しております。
  • このライトバルブは光源に付属するライトバルブと同じです。
  • コントローラがライトバルブの出力パワーを安定させるまでの合計動作時間
  • ライトバルブの使用開始直後、付属のファイバーパッチケーブルを接続して測定したファイバ出力光のパワー
  • 最大バルブ出力強度におけるファイバ端でのパワー 
  • 色温度はユニットにより異なります。
  • ライトバルブの使用開始直後、当社のZrF4 MIRパッチケーブルMZ41L1を接続して測定


Beam Profile of Lamp Output
Click to Enlarge


タングステンハロゲンランプQTH10/Mは、広帯域で発光し(400~2200 nm)、典型的な出力は50 mWです。AC電源(国内専用)が付属します。


+1 数量 資料 型番 - インチ規格 定価(税抜) 出荷予定日
QTH10 Support Documentation
QTH10Customer Inspired! タングステンハロゲンランプ、#8-32タップ(インチ規格)
7-10 Days
+1 数量 資料 型番 - ミリ規格 定価(税抜) 出荷予定日
QTH10/M Support Documentation
QTH10/MCustomer Inspired! タングステンハロゲンランプ、M4タップ(ミリ規格)


QTH10Bは、タングステンハロゲンランプQTH10/Mに対応する交換用ライトバルブです。 交換方法については、QTH10/Mの説明書(PDF形式)のセクション3.4をご参照ください。 最良の画質を得るために、フィラメントが光軸に対して垂直になるようにセットしてください。 ライトバルブを交換する際には、ガラスに皮脂が付着しないよう手袋(ラテックス製または綿製の手袋など)をお使いになることをお勧めします。

+1 数量 資料 型番 - ユニバーサル規格 定価(税抜) 出荷予定日
QTH10B Support Documentation
7-10 Days
Last Edited: Nov 21, 2013 Author: Dan Daranciang