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N-BK7 すりガラス拡散板


  • Offered in 120, 220, 600, and 1500 Grit Polishes
  • Polished for Greater Uniformity than Sand Blasting
  • Round and Square Diffusers

DG05-220

(Ø1/2")

DG10-120

(Ø1")

DG20-600

(Ø2")

DG100X100-120

(100 mm x 100 mm)

Application Idea

Diffused
LED Condenser

Related Items


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特長

  • 4種類のサイズから選択可能:
    • 円形: 12.7 mm(1/2インチ)、25.4 mm(1インチ)、50.8 mm(2インチ)
    • 正方形: 100 mm x 100 mm
  • 基板: N-BK7 (コーティング無)


このマウント無しの N-BK7 すりガラス拡散板は、ガウシアン状の拡散分布を必要とする幅広い用途でお使いいただけます。 すりガラス拡散板は、粒度が120、220、600、1500のいずれかの研磨剤で研磨されています。 12.7 mm(1/2インチ)、25.4 mm(1インチ)、50.8 mm(2インチ)の円形の拡散板に加えて、100 mm x 100 mmの正方形の拡散板においては、全ての粒度で加工された製品がそろっています。

さらに高い透過率を実現するためにØ25.4 mm(Ø1インチ)の拡散板では、350~700 nmまたは650~1050 nmのARコーティング付きでご提供しています。 拡散板を取り付ける時には、研磨面を光源の反対側に向ける必要があります。

研磨された拡散板は、サンドブラスト拡散板より高い表面均一性があります。 様々な研磨剤が、細かい散乱から粗い散乱まで幅広い散乱を可能にします。 細かい研磨(1500グリットなど)では透過率が高くなります。粗い研磨(120グリットなど)では透過率が低くなりますが、拡散のパターンは広がります。 上のグラフではガラス拡散板の性能を比較しています。

使用例」タブに、拡散LEDコンデンサへのすりガラス拡散板の適用例が記載されておりますので、ご覧ください。 発散角、照度の空間分布、強度プロファイルをより厳密に規定する必要がある場合は、当社のトップハット型ビーム出力拡散板をご検討ください。 また、用途が紫外域のスペクトル範囲に広がってもご利用いただける、UV溶融石英(UVFS)拡散板もご提供しています。

拡散板セレクションガイド
Ground Glass Diffusers
Standard DiffusersN-BK7 SubstrateUnmounted, Uncoated350 nm to 2.0 µm
Unmounted, AR Coated350 nm - 700 nm
650 nm - 1050 nm
Mounted, Uncoated350 nm - 2.0 µm
UVFS SubstrateUnmounted, Uncoated185 nm - 2.0 µm
Diffuse ReflectorsN-BK7 SubstrateUnmounted, UV-Enhanced Aluminum Coated250 nm - 450 nm
Unmounted, Protected Silver Coated450 nm - 20 µm
Unmounted, Protected Gold Coated800 nm - 20 µm
Alignment Disks
Engineered Diffusers
Diffuser Kits

Click to Enlarge
633 nmで測定。
こちらをクリックするとデータがダウンロードできます。
Common Specifications
Diameter Tolerancea+0.00/-0.25 mm
Thickness2.0 mm
Thickness Tolerance±0.2 mm
Clear Aperture>90%
Surface Flatness of Smooth Side (@ 633 nm)<4λ
Surface Quality of Smooth Side80-50 Scratch-Dig
Parallelism<3 arcmin
  • 直径の公差は円形の光学素子に関するもので、正方形の拡散板には該当しません。
Item #SizeGrit
DG05-120Ø1/2"120
DG05-220Ø1/2"220
DG05-600Ø1/2"600
DG05-1500Ø1/2"1500
DG10-120Ø1"120
DG10-220Ø1"220
DG10-600Ø1"600
DG10-1500Ø1"1500
DG20-120 Ø2"120
DG20-220 Ø2"220
DG20-600Ø2"600
DG20-1500 Ø2"1500
DG100X100-120  100 mm x 100 mm120
DG100X100-220  100 mm x 100 mm220
DG100X100-600  100 mm x 100 mm600
DG100X100-1500  100 mm x 100 mm1500

透過率はデータの取得方法に影響されることにご注意ください。この測定では、積分球センサと分光器が共に用いられています。分光器では許容受光角度が小さいため、グリッド値が小さくなり大きく分散した光を全て受光するのが困難になります。したがって、グリッド値が低くなると透過率も低くなります。

Transmission of 120 Grit Diffusers
Click to Enlarge
生データはこちらからダウンロードいただけます。
Transmission of 220 Grit Diffusers
Click to Enlarge
生データはこちらからダウンロードいただけます。
Transmission of 600 Grit Diffusers
Click to Enlarge
生データはこちらからダウンロードいただけます。
Transmission of 1500 Grit Diffusers
Click to Enlarge
生データはこちらからダウンロードいただけます。

コリメート済みLED光源構成例

右下の図の構成例では、LED光源の出力光をコリメートする拡散LEDコンデンサの一部に50.8 mm角、600グリットのすりガラス拡散板DG20-600を使用しています。当社では、構成例と同じような性能を有するコリメート済みのLED光源もご提供していますが、こちらでは教育用の教材などに適した自作ができるセットアップを例示しています。この構成例は、60 mmケージシステムを使って構築されています。当社の60 mmケージアセンブリは、ケージロッドで連結するケージシステム対応の部品から構成されています。各ケージ用部品は間隔60 mmのネジ穴が4つあり、様々な長さのØ6 mmの頑丈なスチール製ロッドを使用してケージシステムに組み込みます。こちらの構成では、長さ101.6 mmのロッドが使われています。 ケージシステムを構築することにより、ケージシステム内の光学部品が共通の光軸を持ち、正確な固定が可能となります。

SM1内ネジ付きマウント済み温白色LED MWWHL4を60 mmケージシステムに組み込むには、マウント済みLEDをケージプレートアダプタLCP02/M(30 mm-60 mm変換)に接続したレンズチューブカプラSM1T2を用います。次に、固定リングSM2RRを用いて60 mm ケージプレートLCP01/Mに取付けた50.8 mm角、600グリットのすりガラス拡散板へ光源を向けます。LED光を拡散し、Ø50.8 mm(Ø2インチ)平凸レンズLA1401でコリメート光となります。レンズにはコーティングが施されておらず、焦点距離は60.0 mmです。 レンズは60 mm ケージプレートLCP01/Mに取り付けます。

60 mmケージシステム全体を、マウントLCP01/Mの底面でポストTR75/M-JP上に固定します。ポストはポストホルダPH75/Mと取付ベースBA2/Mでブレッドボードに固定します。

下表は拡散LEDコンデンサの構築に必要な構成部品のリストです(インチ規格とミリ規格)。

型番数量Description
Imperial Product List
MWWHL41Mounted Warm White Light LEDa
LCP02130 mm to 60 mm Cage Plate Adapter
SM1T21SM1 (1.035"-40) Coupler, External Threads
LCP01260 mm Threaded Cage Plate (Two SM2RR Retaining Rings Included)
DG20-6001Ø2", Unmounted N-BK7 Ground Glass Diffuser, 600 Grit
ER4-P41Cage Assembly Rod, 4" Long, Ø6 mm, 4 Pack
LA14011N-BK7 Uncoated Plano-Convex Lens, Ø2", f = 60.0 mm
TR31Ø1/2" x 3" Post
PH31Post Holder with Spring-Loaded Thumbscrew, L=3"
BA21Mounting Base, 2" x 3" x 3/8"
型番数量Description
Metric Product List
MWWHL41Mounted Warm White Light LEDa
LCP02/M130 mm to 60 mm Cage Plate Adapter
SM1T21SM1 (1.035"-40) Coupler, External Threads
LCP01/M260 mm Threaded Cage Plate, Metric (Two SM2RR Retaining Rings Included)
DG20-6001Ø2", Unmounted N-BK7 Ground Glass Diffuser, 600 Grit
ER4-P41Cage Assembly Rod, 4" (101.6 mm) Long, Ø6 mm, 4 Pack
LA14011N-BK7 Uncoated Plano-Convex Lens, Ø50.8 mm, f = 60.0 mm
TR75/M1Ø12.7 mm x 75 mm Post
PH75/M1Post Holder with Spring-Loaded Thumbscrew, L=75 mm
BA2/M1Mounting Base, 50 mm x 75 mm x 10 mm
  • T-Cube™ LEDドライバ LEDD1B(または標準規格品の円形4ピンM8コネクタ付)をお持ちでない場合は、ドライバが必要となり、加えて電源をご購入いただく必要がございます。

Posted Comments:
rooogerlo06  (posted 2017-12-11 22:27:07.803)
Dear Thorlabs pals, Could you kindly explain how can I compare the capability of the diffuser by only transmission? I bought one ground glass diffuser and the diffused phenomenon is not clear. Could you help us on this case? Thanks for your strongly support. Best regards, Roger Lo
llamb  (posted 2018-03-02 08:19:16.0)
Hello Roger, thank you for contacting Thorlabs. There will tend to be a higher transmission for the finer/higher grits, as the less diffusive surface will scatter less. I will reach out to you directly as well.
dennis.gardner  (posted 2017-12-05 11:01:03.527)
There are a few standards regarding grit size. Which standard is being used here? ISO/FEPA? CAMI?
nbayconich  (posted 2018-05-07 03:03:57.0)
While we do not specify grit standards, we use the CAMI standard when polishing diffusers in-house while inspecting diffusers received from external vendors to a similar standard.
akuznetsov  (posted 2017-09-07 12:27:08.297)
Would be good to have images of the diffuser showing how well different grits diffuse light for a point source for example, or an LED source preferably. The point is to figure out which grit will be suitable for application based on how well the diffuser homogenizes the light. The setup would require a camera with a lens looking directly at the diffuser with the light behind the diffuser, preferably in a coupled configuration. In fact would be good to have this type of image for all diffuser optics.
tfrisch  (posted 2017-10-20 01:05:01.0)
Hello, thank you for contacting Thorlabs. I agree that an application image comparing different grits could be valuable. I have passed this note on to our Marketing Team. I'll reach out to you directly as well.
maudolci  (posted 2017-01-13 11:46:03.74)
Hi, I need a diffuser working at wavelengths up to 2200 nm. The graphs onto your website are however limited to 1200 nm. Looking at them, I noticed for example that the transmission is very good and flat up to 1200 nm and it seems that the trend could be extended beyond this maximum wavelength. Have you such data ? Many thanks in advance, Mauro Dolci
tfrisch  (posted 2017-01-25 04:37:40.0)
Hello, thank you for contacting Thorlabs. I would expect similar performance out to 2200nm. I will reach out to you directly.
david.jung  (posted 2015-06-19 14:37:06.327)
Hi, I am wondering at which wavelength the diffuser transmission vs. output angle (displayed in the overview) was measured. Also, how much does this graph change for different wavelength in the visible and NIR range? Thanks!
besembeson  (posted 2015-09-21 01:45:15.0)
Response from Bweh at Thorlabs USA. This was done using 633nm wavelength. The graph should not change significant with wavelength as the grit sizes are much larger than the wavelengths used with these diffusers.
andreas.wittmann  (posted 2013-06-07 09:18:51.91)
I have question concering ground diffusers: We would like to create some diffusive feedback to the laser (to study the impact of feedback on the laser performance). In our experiment, we have the laser then comes the diffuser (tilted by 30°) and after the diffuser the photodiode (the laser points diretely (through the diffuser) into the photodiode). Our questions: 1. We need just a bit of feedback (below 0.1%). 2. not absolute necessary, but an AR coating at 1512nm would be useful 3. Size: Could you make a window of 7.5mm diameter 4. What is the transmission of the glasses (we want to measure the laser power with a fotodiode on the other side of the diffuser. The transmission should be high (not too much disturbed by the diffuser)
tcohen  (posted 2013-06-12 20:10:00.0)
Response from Tim at Thorlabs: We can provide a –C AR coating if desired as well as provide custom diameters. The amount you receive at your photodiode is dependent on the geometry of your setup as they will diffuse in an intensity distribution as shown in the graph on the “Overview” tab. We also have the total transmission available on the “Graphs” tab. We will contact you to discuss your setup directly.
jasper.hoogveld  (posted 2013-05-02 08:20:28.253)
when i open the step file i can't see the grid(profile) i want to put the stepfile into an optical simulation programme to trace the rays. i would like to know if this is possible maybe you could diliver me raydata files i have ordered two diffusers dg10-1500 -a and dg10 120 -a
tcohen  (posted 2013-05-16 16:07:00.0)
Response from Tim at Thorlabs: We do not currently have a surface model for ray tracing this diffuser. We will look into providing this for the future and I will contact you to keep you updated.
joanna.brunker.09  (posted 2012-04-04 06:42:52.0)
This is probably a silly question, but which way round should I use the diffuser? i.e. Should my laser beam be hitting the shiny surface or the "frosted" surface first? I have already destroyed two holographic diffusers so I don't want to make another mistake...
tcohen  (posted 2012-04-03 10:23:00.0)
Response from Tim at Thorlabs: The setup in the “Application Idea” will produce a uniform but collimated beam from your LED. If uniformity is more of a concern than transmittance, using a lower grit diffuser will allow for more diffusion. Also, as an alternative we offer Engineered Diffusers at http://thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=1660 which will greatly homogenize the input illumination. I have contacted you to further discuss the use of these diffusers in your application.
zach.yang  (posted 2012-04-02 10:59:24.0)
Dear Sir, I am looking for a solution which can produce a very uniform but still collimated White LED beam, at ~5cm distance from the lens output surface. Is the Application Idea in the Ground Glass Diffuser suitable for my application? I'm afraid this would also make a non-uniform distribution, which is similar to my previous many experiments. Or do you have any ideas? Thank you very much!
tcohen  (posted 2012-03-08 15:20:00.0)
Response from Tim at Thorlabs: Thank you for your feedback. The finest custom grind we are currently able to provide is 3 micron. This would translate to about 1800 in grit size. Currently we are able to provide the ½" and 1” diameter sizes with this 3 micron polish.
shorvath  (posted 2012-03-06 15:22:55.0)
I was wondering if Thorlabs would be able to offer custom made higher grit diffusers, and if so, what is the highest grit?
jjurado  (posted 2011-03-28 18:12:00.0)
Response from Javier at Thorlabs to jyyu: Thank you very much for contacting us. We can certainly offer ground glass diffusers in UV Fused Silica. I will contact you directly to get more details about your requirements. Also, we will emphasize the advantage of UV Fused Silica over BK7 with respect to light-induced fluorescence (LIF) throughout our optics pages.
jyyu  (posted 2011-03-25 18:29:59.0)
Can you fabricate these diffuser using UV fused silica substrate? We had some problem with the fluorescence of BK7.
klee  (posted 2009-11-12 11:20:15.0)
A response from Ken at Thorlabs to giovanni.miotto: We have tested the transmission at 0° for all 4 different grits and the results are in line with the graph on this page. The 1500 grit has >80% transmission over the 350 to 700 nm range, while the 600 grit has >72% over the same range. If you are interested, we will be happy to take back the ones you have and evaluate them.
giovanni.miotto  (posted 2009-11-08 20:01:07.0)
I have tested your dg20-600 and 1500 grit following your graph on trasmission. Surprisingly I have found no difference in trasmission between them (measured with a spectrofotometer), moreover the trasmission is very poor (about 40%). For comparison another glass diffuser that I have (but I do not know the grit) perform 80% trasmission and looks more coarse. I am wondering if your graph is correct, my suspect is that the scale is inverted and the 120 grit is the more trasmissive. Please let me know if this is the case
klee  (posted 2009-07-28 17:44:46.0)
Response from Ken at Thorlabs to wouter.oepts: We do produce these diffusers. We have been selling them for 5 years and they sell well. So you should feel confident that you can get a constant flow of them from us.
wouter.oepts  (posted 2009-07-28 08:38:15.0)
Hi, I am looking for glass diffusers for a lighting application. As a starting point I believe your glass plates can fullfill the product requirements. However, when taking this to production we would be in need of acquiring a constant flow of these plates. Are you producing these plates yourselves? Or are these commercially available elsewher? Thank you, Wouter Oepts.
Tyler  (posted 2008-04-15 15:27:11.0)
A response from Tyler at Thorlabs to pascal.mauron: Thank you for contacting us with your component needs. An application engineer will contact you with information about our current products and the feasibility of providing you with a custom solution for your application.
pascal.mauron  (posted 2008-04-14 07:02:54.0)
Dear Sir, Dear Madam, Im interested in this product and have two questions about it: - is it available with a thickness of 1 mm? - how are its properties affected when not used in air? Alternatively, do you know of any commercially available diffusers that get their properties from bulk and not from surface treatment? With my best regards, Pascal Mauron

Ø12.7 mm N-BK7すりガラス拡散板

+1 数量 資料 型番 - ユニバーサル規格 定価(税抜) 出荷予定日
DG05-120 Support Documentation
DG05-120N-BK7すりガラス拡散板、Ø12.7mm(1/2インチ)、120グリット
¥1,694
Today
DG05-220 Support Documentation
DG05-220N-BK7すりガラス拡散板、Ø12.7mm(1/2インチ)、220グリット
¥1,694
Today
DG05-600 Support Documentation
DG05-600N-BK7すりガラス拡散板、Ø12.7mm(1/2インチ)、600グリット
¥1,694
Today
DG05-1500 Support Documentation
DG05-1500N-BK7すりガラス拡散板、Ø12.7mm(1/2インチ)、1500グリット
¥1,694
Today

Ø25.4 mm N-BK7すりガラス拡散板

+1 数量 資料 型番 - ユニバーサル規格 定価(税抜) 出荷予定日
DG10-120 Support Documentation
DG10-120N-BK7すりガラス拡散板、Ø25.4mm(1インチ)、120グリット
¥1,899
Today
DG10-220 Support Documentation
DG10-220N-BK7すりガラス拡散板、Ø25.4mm(1インチ)、220グリット
¥2,036
Today
DG10-600 Support Documentation
DG10-600N-BK7すりガラス拡散板、Ø25.4mm(1インチ)、600グリット
¥2,036
Today
DG10-1500 Support Documentation
DG10-1500N-BK7すりガラス拡散板、Ø25.4mm(1インチ)、1500グリット
¥2,036
Today

Ø50.8 mm N-BK7すりガラス拡散板

+1 数量 資料 型番 - ユニバーサル規格 定価(税抜) 出荷予定日
DG20-120 Support Documentation
DG20-120N-BK7すりガラス拡散板、Ø50.8mm(2インチ)、120グリット
¥2,349
3-5 Days
DG20-220 Support Documentation
DG20-220N-BK7すりガラス拡散板、Ø50.8mm(2インチ)、220グリット
¥2,349
3-5 Days
DG20-600 Support Documentation
DG20-600N-BK7すりガラス拡散板、Ø50.8mm(2インチ)、600グリット
¥2,349
3-5 Days
DG20-1500 Support Documentation
DG20-1500N-BK7すりガラス拡散板、Ø50.8mm(2インチ)、1500グリット
¥2,349
Today

100 mm x 100 mm N-BK7すりガラス拡散板

+1 数量 資料 型番 - ユニバーサル規格 定価(税抜) 出荷予定日
DG100X100-120 Support Documentation
DG100X100-120N-BK7すりガラス拡散板、100mm x 100mm、120グリット
¥6,146
Today
DG100X100-220 Support Documentation
DG100X100-220N-BK7すりガラス拡散板、100mm x 100mm、220グリット
¥6,146
Today
DG100X100-600 Support Documentation
DG100X100-600N-BK7すりガラス拡散板、100mm x 100mm、600グリット
¥6,146
Today
DG100X100-1500 Support Documentation
DG100X100-1500N-BK7すりガラス拡散板、100mm x 100mm、1500グリット
¥6,146
Today
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