ポルカドットビームスプリッター


  • Constant Reflection to Transmission Ratio Over Range
  • 50:50 Beamsplitters
  • Metal Coating is Relatively Insensitive to Incident Angle

BPD254S-G

(1" x 1", B270 Glass Substrate)

BPD5254-G01

(Ø1", CaF2 Substrate)

BPD508-FS

(Ø2", UVFS Substrate)

Related Items


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Polka Dot Coating
アルミニウムコーティングパターンの詳細
Drawing

特長

  • 広いスペクトル範囲で50:50のビーム分岐比:
    • UV溶融石英(UVFS): 250 nm~2.0 µm
    • B270: 350 nm ~2.0 µm
    • フッ化カルシウム(CaF2): 180 nm~8.0 µm
  • 3種類の基板: UV 溶融石英、B270 ガラス、フッ化カルシウム (CaF2)

50:50ポルカドットビームスプリッタは、仕様のスペクトル範囲にわたってほぼ一定のビーム分岐比です。 この製品では、3種類のガラス基板(UV 溶融石英、B270 ガラス、フッ化カルシウム)に真空蒸着したアルミニウムコーティングが施してあります。 金属製のコーティング加工が施されているので、入射角が大きく変わっても、反射後または透過後の強度はほとんど変わりません。 波長や角度に依存した反射率や透過率のデータをご覧いただくには下記仕様表内のグラフアイコンをクリックしてください。

アルミニウムコーティングは、規則正しく繰り返す形状で塗布されているので、右図のように「ポルカドット(水玉)」模様になります。 ビームスプリッタでは、アルミニウムコーティングを施した部分が光を反射して、コーティング無しの部分が光を透過します。 反射強度を最大にするには、ビームスプリッタのコーティングを施した側に光を入射する必要があります。四角形のドットの長辺は100 µmで、ドット間の間隔は全方向で56 µmです。

ポルカドットビームスプリッタは、上図の様に入射ビーム角45°で一般的には使用されます。当社のポルカドットビームスプリッタは、直径2 mmよりも大きなビームを入射した際に50% ± 5% です。

Ø25.4 mm(Ø1インチ)とØ50.8 mm(Ø2インチ)のポルカドットビームスプリッタは、それぞれ当社のØ25 mm~Ø25.4 mm(Ø1インチ)およびØ50 mm~Ø50.8 mm(Ø2インチ)用の光学マウントに取り付けられます。 25.4 mm x 25.4 mmの正方形のタイプは固定式のフィルターマウントで保持できます。マウント可能な製品の1例として小型2重フィルターホルダDH1/Mがあります。

当社では誘電体コーティング付きのプレート型ビームスプリッタの製品シリーズもご提供しています。 ビームスプリッタを選択するにあたっての詳細は「BSセレクションガイド」タブに掲載されていますので、ご参照ください。

ビームスプリッタのセレクションガイド

当社ではビームを強度比や偏光に基づいて分岐する、様々なタイプのビームスプリッタを豊富に取り揃えています。プレート型やキューブ型のビームスプリッタのほか、形状の異なるペリクルや複屈折性結晶を用いた製品もございます。それぞれの概要や特徴・用途の比較についてはこちらの概要タブをご覧ください。ビームスプリッタの多くはマウント付きまたはマウント無しでご提供しています。以下では、当社のビームスプリッタの全製品を一覧できます。各種類のMore [+]をクリックすると、ビームスプリッタの種類、波長域、分岐比/消光比、透過率、サイズなどの詳細をご覧いただけます。

プレート型ビームスプリッタ

偏光無依存ビームスプリッタ、プレート型
偏光ビームスプリッタ、プレート型
  • 特記がない限り入射角は45°
  • 円形光学素子のみ30 arcminウェッジ付き
  • P偏光用に設計されています。

キューブ型ビームスプリッタ

Non-Polarizing Cube Beamsplitters
Polarizing Cube and Polyhedron Beamsplitters
TypeWavelength RangeExtinction Ratio
(TP:TS)
Typical TransmissionAR Coated
Faces
CementedAvailable Cube/ Polyhedron Side Length
Standard:
Unmounted
16 mm Cage Cube
30 mm Cage Cube
420 - 680 nm>1000:1Graph IconYesYesUnmounted:
5 mm, 10 mm, 1/2",
20 mm, 1", and 2"

Mounted:
20 mm in a 16 mm Cage Cube,
1" in a 30 mm Cage Cube
620 - 1000 nmGraph Icon
700 - 1300 nmGraph Icon
900 - 1300 nmGraph Icon
1200 - 1600 nmGraph Icon
Wire Grid:
Unmounted
30 mm Cage Cube
400 - 700 nm>1000:1 (AOI: 0° - 5°)
>100:1 (AOI: 0° - 25°)
Graph Icon
P-Pol.



S-Pol.
YesYesUnmounted:
1"

Mounted:
20 mm in a 16 mm Cage Cube,
1" in a 30 mm Cage Cube
High-Power Laser Line:
Unmounted
30 mm Cage Cube
355 nm>2000:1Graph IconNoUnmounted:
1/2" and 1"

Mounted:
1" in a 30 mm Cage Cube
405 nmGraph Icon
532 nmGraph Icon
633 nmGraph Icon
780 - 808 nmGraph Icon
1064 nmGraph Icon
Laser Line:
Unmounted
30 mm Cage Cube
532 nm>3000:1Graph IconYesYesUnmounted:
10 mm, 1/2", and 1"

Mounted:
1" in a 30 mm Cage Cube
633 nmGraph Icon
780 nmGraph Icon
980 nmGraph Icon
1064 nmGraph Icon
1550 nmGraph Icon
High Extinction Ratio, High-Power, Broadband Polyhedrons700 - 1100 nm >1000:1 (700 - 1100 nm)
 >5000:1 (750 - 1000 nm)
 >10 000:1 (800 - 900 nm)
YesNo12.7 mm
(Input/Output Face, Square)
900 - 1300 nm>1000:1 (900 - 1300 nm)
 >10 000:1 (900 - 1250 nm)
>100 000:1 (980 - 1080 nm)
10.0 mm and 5.0 mm
(Input/Output Face, Square)
Laser-Line Variable532 nmNot SpecifiedNo Graph AvailableYesYesAssembly Mounted
in a 30 mm Cage Cube
633 nm
780 nm
1064 nm
1550 nm
Broadband Variable 420 - 680 nmNot SpecifiedNo Graph AvailableYesYesAssembly Mounted
in a 30 mm Cage Cube
690 - 1000 nm
900 - 1200 nm
1200 - 1600 nm
Circular
Polarizer/Beamsplitter
532 nmNot SpecifiedNo Graph AvailableYesYesAssembly Mounted
in a 30 mm Cage Cube
633 nm
780 nm
1064 nm
1550 nm

ペリクルビームスプリッタ

偏光無依存ビームスプリッタ、ペリクル型

結晶ビームスプリッタ

偏光ビームスプリッタ、結晶型
  • 保護用筐体、ネジ切り無しリング、またはシリンダにマウント済み
  • マウント無しの製品と保護用筐体またはネジ切り無しシリンダにマウント済みの製品をご用意しています。

その他

その他のビームスプリッタ

Posted Comments:
Liaoxin Sun  (posted 2023-09-11 11:53:05.427)
I bought Polka-Dot beamsplitters, BPD5254-G01, for 457nm laser pump and infrared emission collection, an obviously diffraction occurs for 457nm, multiple laser spots appeared. Is this normal?
cdolbashian  (posted 2023-09-25 10:08:25.0)
Thank you for reaching out to us with this concern. I notice that the mirrored elements are separated by 50um for each element. This falls into a small enough separation to induce some effects of diffraction. The amplitude and spacing of fringes can be determined by using the J1 Bessel function and some algebra. I have contacted you directly with some supporting documentation.
Alyssa Kostadinov  (posted 2021-11-30 08:34:09.963)
Hi, do you have any data about the polarization dependency on reflection and transmission of s and p components at 45 degree AOI at 400-700nm range? Thank you
YLohia  (posted 2021-11-30 02:59:07.0)
Hello, additional data can be requested by emailing techsupport@thorlabs.com. I have reached out to you directly with more information on the performance as a function of s and p polarization components.
Hsiang-Chu Wang  (posted 2021-02-15 07:58:25.033)
Dear Thorlab I am interested in the component (BPD508-G), and wonder if it can be diced into a 25.2 mm x 35.6 mm x 1.5 mm. Can you please also send me the spectrum of the transmission and reflection for both s- and p-polarized illumination. Please contact me thanks.
YLohia  (posted 2021-02-16 11:57:15.0)
Hello, thank you for contacting Thorlabs. Custom optics can be requested by clicking on the "Request Quote" button above or by emailing techsupport@thorlabs.com. We will discuss the possibility of offering this directly. I have reached out to you with the transmission/reflection plots.
Ivo Aubrecht  (posted 2019-06-18 08:27:22.74)
Do you also sell beam splitters with uniform metallic coatings (no patterning)? with the same performance (approx. 50:50) in an angular range 5 - 45 deg?
YLohia  (posted 2019-06-18 08:48:19.0)
Hello, thank you for contacting Thorlabs. We will reach out to you directly to discuss the possibility of offering this item.
nikita.levichev  (posted 2018-08-21 13:54:48.983)
Hello! I want to use Polka-Dot beamsplitters for the process monitoring (VIS-NIR). Are there any distortions in image quality after such splitting? And what is the average size of aluminum coating parts?
YLohia  (posted 2018-08-21 09:01:36.0)
Hello, thank you for contacting Thorlabs. There are indeed distortions in image quality after splitting. The feature size is 100 um x 100 um with a 56 um spacing between the metal coated squares (for UVFS, B270, and CaF2 substrates). I will reach out to you directly to discuss your application further and suggest suitable alternatives based on your requirements.
robert.woodward  (posted 2018-02-07 14:47:18.64)
Please could you provide the polarisation dependence of this product (I'm particularly interested in: BPD5254-G01). How does this compare to your other mid-IR beamsplitters (and is there any information on damage thresholds too please?). Many thanks.
YLohia  (posted 2018-03-29 01:14:12.0)
Response from Yashasvi at Thorlabs USA: Hello, thank you for contacting Thorlabs. S-polarization state will impact the average reflectance and average transmission by roughly +5% and -5%, respectively. P-polarization state will impact the average reflectance and average transmission by roughly -5% and +5%, respectively. I will reach out to you directly with plots for comparison with other mid-IR beamsplitters. Unfortunately, we have not performed damage threshold tests for this product line as of now. An estimate for the damage threshold can be provided by looking up our general damage threshold for our aluminum coating (0.3 J/cm2 at 1064 nm, Ø1.00 mm pulsed beam, 10 ns pulses @ 10 Hz), but since we have not performed specific tests for this product line as of now, we advise to err on the side of caution.
maxirossa  (posted 2017-10-03 07:19:25.47)
What are the laser-induced damage thresholds of the polka dot beamsplitters, especially the BPD5254-G01 and the BPD254-FS? Thanks in advance.
nbayconich  (posted 2017-10-05 01:05:37.0)
Thank you for contacting Thorlabs. At the moment we have not tested these optics. I will reach out to you directly to discuss your application requirements of these polka dot beamsplitters.
kaiqianglin  (posted 2017-06-14 05:03:42.573)
Hey, do you have any data about the polarization dependency on reflection of s and p components at 45 degree incident? We want to use it as a non-polarizing beam splitter. Many thanks.
nbayconich  (posted 2017-06-15 05:07:56.0)
Thank you for contacting Thorlabs. There is some polarization dependency in these polka dot beamsplitters. I will contact you directly about our S and P polarization reflectivity & transmission measurements.
Thorlabs  (posted 2010-11-29 14:23:17.0)
Response from Javier at Thorlabs to bung: we do not have information regarding the dispersive properties of our polka dot beamsplitters. Also, I will check with our optics department regarding the details about the dot sizes and the spacing, and their relationship with the beam diameter, which is recommended to be limited to 2 mm at minimum. We will contact you directly with mnore information.
bung  (posted 2010-11-22 23:20:49.0)
Hi, I am concerned about the dispersive properties of the polka dots on the beam splitter. Moreover, I am concerned about the correlation between the dot sizes and the minimum beam size acceptable. Is it in fact possible to present some calculation data, as to why the dots are the size and spacing? Thank you.
apalmentieri  (posted 2009-12-14 14:34:03.0)
A response from Adam at Thorlabs, Inc: From your description, I believe you are asking about the dispersive properties of the AL coating in which case you will not see any dispersive effects from the AL coating. I will email you shortly to try and get more information about your setup to see if we can provide anymore information.
gmp1g09  (posted 2009-12-14 12:28:09.0)
Sorry, there was a misunderstanding. I meant spectral interference, not spatial interference. I mean, I dont care if the wavefront is spatially distorted and the two beams dont interfere spatially. The only think important for me is that each wavelenght of one broadband beam interfere with the same wavelenght of the other beam. Is it possible with polka dot? Thanks for your patience. Giorgio
apalmentieri  (posted 2009-12-14 12:01:13.0)
A response from Adam at Thorlabs: I would not recommend using the polka dot beamsplitter inside an interferometer. The polka dot beamsplitter splits the beam via small reflective AL squares on a transmissive substrate. These squares create a speckled beam pattern distorting the overall wavefront. This distorted wavefront is not suitabel for an interferometer. I would recommend looking at the cube or plate beamsplitters, BS013 or BSW10.
gmp1g09  (posted 2009-12-12 14:48:04.0)
Hello, please advise if "polka dot" BS can be used in an interferometer (either Michelson or Mach Zehender interferometers). In general I am looking for BS that has no (or low) polarisation sensitivity and very broad band (600nm up to 1600nm). I need that the two beams which combine each other in the interferometer would be allowed to correctly interfere in the polka dot beamsplitter/combiner. Is it ok the polka dot for generating interference between two beams? Dr. Giorgio Ponzo ORC (Optoelectronics Research Centre) Southampton (UK)
Tyler  (posted 2008-11-05 16:32:29.0)
A response from Tyler at Thorlabs to boris_golberg: We dont currently have a standard product that will meet the specifications that you listed. A member of our technical support department will contact you to discuss your application and discuss the possibility of creating a custom part quote. Thank you for sending Thorlabs your product request. We love to hear about new products and when possible we add them to our product line so that they become a standard product with same-day shipping availability.
boris_golberg  (posted 2008-10-27 02:54:04.0)
Hello, please advise if "polka dot" BS can be use for imaging application (microscope). Ratio I need T/R = 10/90, imaging use reflection part. In general I am looking for BS that has no (or low) polarisation sensitivity @ 193 nm with T/R = 10/90. Please advise
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UV溶融石英製ポルカドットビームスプリッタ、250 nm~2.0 µm

Specifications
Available SizesØ1", Ø2", or 1" Square
Beamsplitting Ratio50% ± 5%
Minimum Beam Diameter
for 50/50 Split
2 mm
MaterialUV Fused Silica
Wavelength Range250 nm - 2.0 µm
Coating PatternSquare-Coated Apertures
0.0040" (100 µm) Sides, 0.0022" (56 µm) Spacing
Clear Aperture>90% Diameter (Round Optics)
>90% Length and Height (Square Optics)
Thickness1.5 mm (Nominal)
Dimensional Tolerance+0.0 / -0.5 mm
Angle of Incidence0 to 45°

このポルカドットビームスプリッタは、UV溶融石英(UVFS)製で250 nm~2.0 µmのスペクトル範囲で高い透過率を示します。 このビームスプリッタは0~45°の入射角(AOI)でご使用いただけます。この入射角の範囲では、反射光強度や透過光強度の変化はごく僅かです。 反射光強度を最大にするには、アルミニウムコーティング側に光が入射する必要があります。

Transmission and Reflectance Dataa
0° and 8° AOIbinfo
45° AOIinfo
  • 生データはこちらからダウンロードいただけます。
  • 透過率は入射角0°、反射率は入射角8°でそれぞれ測定されています。
+1 数量 資料 型番 - ユニバーサル規格 定価(税抜) 出荷予定日
BPD254S-FS Support Documentation
BPD254S-FSPolka Dot Beamsplitter, 1" x 1", UV Fused Silica
¥22,457
7-10 Days
BPD254-FS Support Documentation
BPD254-FSPolka Dot Beamsplitter, Ø1", UV Fused Silica
¥22,457
7-10 Days
BPD508-FS Support Documentation
BPD508-FSPolka Dot Beamsplitter, Ø2", UV Fused Silica
¥80,072
7-10 Days
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B270ガラス製ポルカドットビームスプリッタ、350 nm~2.0 µm

Specifications
Available SizesØ1", Ø2", or 1" Square
Beamsplitting Ratio50% ± 5%
Minimum Beam Diameter
for 50/50 Split
2 mm
MaterialB270
Wavelength Range 350 nm - 2.0 µm
Coating PatternSquare-Coated Apertures
0.0040" (100 µm) Sides, 0.0022" (56 µm) Spacing
Clear Aperture>90% Diameter (Round Optics)
>90% Length and Height (Square Optics)
Thickness1.5 mm (Nominal)
Dimensional Tolerance+0.0 / -0.5 mm
Angle of Incidence0 to 45°

このポルカドットビームスプリッタは、B270ガラス製で350 nm~2.0 µmのスペクトル範囲で高い透過率を示します。 このビームスプリッタは0~45°の入射角(AOI)でご使用いただけます。この入射角の範囲では、反射光強度や透過光強度の変化はごく僅かです。 反射光強度を最大にするには、アルミニウムコーティング側に光が入射する必要があります。

Transmission and Reflectance Dataa
0° and 8° AOIbinfo
45° AOIinfo
  • 生データはこちらからダウンロードいただけます。
  • 透過率は入射角0°、反射率は入射角8°でそれぞれ測定されています。
+1 数量 資料 型番 - ユニバーサル規格 定価(税抜) 出荷予定日
BPD254S-G Support Documentation
BPD254S-GPolka Dot Beamsplitter, 1" x 1", B270 Glass
¥16,925
Today
BPD254-G Support Documentation
BPD254-GPolka Dot Beamsplitter, Ø1", B270 Glass
¥16,925
7-10 Days
BPD508-G Support Documentation
BPD508-GPolka Dot Beamsplitter, Ø2", B270 Glass
¥44,592
7-10 Days
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フッ化カルシウム製ポルカドットビームスプリッタ、180 nm~8.0 μm

Specifications
Available SizesØ1" or Ø2"
Beamsplitting Ratio50% ± 5%
Minimum Beam Diameter
for 50/50 Split
2 mm
MaterialCaF2
Wavelength Range 0.18 - 8.0 µm
Coating PatternSquare-Coated Apertures
0.0040" (100 µm) Sides, 0.0022" (56 µm) Spacing
Clear Aperture>90% Diameter
Surface Flatnessλ/4 at 632.8 nm, Over Clear Aperture
Surface Quality60-40 Scratch-Dig
Thickness5 ± 0.3 mm (Ø1" Optics)
8.0 mm (Ø2" Optics)
Diameter Tolerance+0.0 / -0.2 mm
Angle of Incidence0 to 45°

このポルカドットビームスプリッタは、フッ化カルシウム(CaF2)製で180 nm~8.0 µmのスペクトル範囲で高い透過率を示します。 このビームスプリッタは0~45°の入射角(AOI)でご使用いただけます。この入射角の範囲では、反射光強度や透過光強度の変化はごく僅かです。 反射光強度を最大にするには、アルミニウムコーティング側に光が入射する必要があります。

Transmission and Reflectance Dataa
0° and 12° AOIbinfo
45° AOIinfo
  • 生データはこちらからダウンロードいただけます。
  • 透過率は入射角0°、反射率は入射角12°でそれぞれ測定されています。
+1 数量 資料 型番 - ユニバーサル規格 定価(税抜) 出荷予定日
BPD5254-G01 Support Documentation
BPD5254-G01Customer Inspired! Polka Dot Beamsplitter, Ø1", CaF2 Substrate
¥55,660
7-10 Days
BPD5508-G01 Support Documentation
BPD5508-G01Customer Inspired! Polka Dot Beamsplitter, Ø2", CaF2 Substrate
¥87,231
7-10 Days