NDフィルター、マウント無し、ARコーティング付き : 650~1050 nm
- Ø1/2" and Ø25 mm Versions Available
- AR Coated for 650 to 1050 nm
- Optical Densities at 633 nm Prior to Coating: 0.1 to 6.0
- Ideal for Low-Power Applications (<1 W)
NE20B-B
(Ø25 mm)
NE550B-B
(Ø1/2")
Application Idea
NE505B-B Mounted in LMR05
Please Wait
Neutral Density Filter Selection Guide | |
---|---|
Absorptive | |
Uncoated (400 - 650 nm) | Mounted |
Unmounted | |
Uncoated (1000 - 2600 nm) | Mounted |
Unmounted | |
AR Coated (350 - 700 nm) | Mounted |
Unmounted | |
AR Coated (650 - 1050 nm) | Mounted |
Unmounted | |
AR Coated (1050 - 1700 nm) | Mounted |
Unmounted | |
Variable | |
Reflective | |
UV Fused Silica (200 - 1200 nm) | Mounted |
Unmounted | |
N-BK7 (350 - 1100 nm) | Mounted |
Unmounted | |
ZnSe (2 - 16 µm) | Mounted |
Unmounted | |
Wedged UVFS (200 - 1200 nm) | |
Wedged N-BK7 (350 - 1100 nm) | |
Wedged ZnSe (2 - 16 µm) | |
Variable | |
Neutral Density Filter Kits |
Click to Enlarge
NDフィルタの作製に使用される当社の研削機の1つ
特長
- 近赤外光を減衰(650~1050 nmスペクトル対応のARコーティング)
- 633 nmにおけるARコーティング前の光学濃度:0.1~6.0
- マウント無しØ12.7 mm(Ø1/2インチ)およびØ25 mmから選択可能
- ARコーティングにより、光学システムでの後方反射を低減
- 低出力の用途に適した製品(< 1 W)
当社は、両面に650~1050 nmスペクトル対応の広帯域ARコーティングが施された、最も一般的なマウント無し吸収型NDフィルタをご提供しています。 これらのフィルタは、マウント付きや350~700 nmスペクトル対応の広帯域ARコーティング付きでもご用意しています。 詳細は、下にある「セレクションガイド」をご覧ください。
フィルタに施された、高性能多層広帯域Bコーティングは、波長範囲650~1050 nmで表面反射率が最小となるよう設計されているため、迷光が低減されます。 これらのコーティングは、光がフィルタ表面に垂直入射する場合に、指定された波長域にわたって0.5%未満の平均反射率をご提供します。下表の青いInfoアイコン()をクリックすると典型的な透過率データをご覧いただけます。
金属NDフィルタとは異なり、吸収型NDフィルタはSchott社製ガラス(詳細は「仕様」 タブを参照)から加工されています。 どのSchott社製ガラスも、平坦な吸収係数を持つスペクトル特性となっています。使用するガラスのタイプや厚さを変えることによって、4種類のSchott 社製ガラスから全ての吸収型NDフィルタを製造しています。 当社のARコーティング吸収型NDフィルタで得られた平均透過率の詳細については、下記の詳細情報をご参照ください。
光学濃度と透過率
光学濃度(OD)は光学フィルタによりもたらされる減衰率、つまり入射ビームの光パワーをどれだけ減少させるかを示しています。光学濃度(OD)は透過率Tの関数として次の方程式で表されます。
Tは0から1の間の値です。光学濃度の高いNDフィルタ(吸収型)を選択した場合、入射光の吸収率は高く、透過率は低くなります。透過率を高く、吸収率を低くするためには、低い光学濃度のNDフィルタが適切と言えます。例えば、光学濃度2のフィルタでは透過率が0.01であり、フィルタは入射ビームのパワーを1%まで減衰させるという結果になります。当社のNDフィルタの透過率のデータは、パーセント(%)で表示されています。
この製品は、レーザ用安全保護具としてはご利用いただけません。当社では、安全に実験を行っていただくために、迷光の照射を著しく低減できるビームブロックなど、安全保護具や遮光用製品をご用意しております。
Optical Density (OD)a | OD Tolerancea | Substrate | Substrate Thicknessb | Ø1/2" Item # | Ø25 mm Item # |
---|---|---|---|---|---|
0.1 | ±0.01 | NG11 | 0.6 mm | NE501B-B | NE01B-B |
0.2 | ±0.01 | NG11 | 1.4 mm | NE502B-B | NE02B-B |
0.3 | ±0.015 | NG11 | 2.3 mm | NE503B-B | NE03B-B |
0.4 | ±0.02 | NG4 | 0.7 mm | NE504B-B | NE04B-B |
0.5 | ±0.025 | NG4 | 0.9 mm | NE505B-B | NE05B-B |
0.6 | ±0.03 | NG4 | 1.1 mm | NE506B-B | NE06B-B |
0.7 | ±0.04 | NG4 | 1.3 mm | NE507B-B | NE07B-B |
0.8 | ±0.05 | NG4 | 1.5 mm | NE508B-B | NE08B-B |
0.9 | ±0.05 | NG4 | 1.7 mm | NE509B-B | NE09B-B |
1.0 | ±0.05 | NG4 | 1.9 mm | NE510B-B | NE10B-B |
1.3 | ±0.065 | NG4 | 2.5 mm | NE513B-B | NE13B-B |
1.5 | ±0.08 | NG4 | 2.9 mm | NE515B-B | NE15B-B |
2.0 | ±0.1 | NG9 | 1.4 mm | NE520B-B | NE20B-B |
3.0 | ±0.15 | NG9 | 2.1 mm | NE530B-B | NE30B-B |
4.0 | ±0.2 | NG9 | 2.8 mm | NE540B-B | NE40B-B |
5.0 | ±0.25 | NG9 | 3.6 mm | NE550B-B | NE50B-B |
6.0 | ±0.3 | NG1 | 1.5 mm | NE560B-B | NE60B-B |
General Specifications | ||
---|---|---|
Diameter | 12.7 mm | 25.0 mm |
Diameter Tolerance | +0.00 / -0.25 mm | |
Clear Aperture | > Ø11.43 mm | > Ø20.0 mm |
AR Coating Range | 650 - 1050 nm | |
Reflectance (Average) | < 0.5% per Surfacea | |
Surface Quality | 60-40 Scratch-Dig | |
Parallelism | < 10 arcsec | |
For OD < 1.3 | ||
Transmitted Wavefront Error (TWE) | < λ/4 (@ 633 nm) | < λ/4 (@ 633 nm) |
For OD ≥ 1.3 | ||
Surface Flatness | < λ/4 (@ 633 nm) | - |
Transmitted Wavefront Error (TWE) | - | < λ/4 (@ 633 nm) |
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。
青色の網掛け部分は、1面あたりの平均反射率が0.5%未満のARコーティングが施された650~1050 nmの波長範囲を示しています。
Posted Comments: | |
Francis Guay
 (posted 2024-08-21 06:21:45.41) What the uncertainty on OD at 1030nm for this filter.
is it in the range OD1.3 +/- 0.1 Guodong Peng
 (posted 2023-08-17 09:55:22.78) The anti-reflection ND filters are very useful in machine vision, reducing the amount of stray light and enhancing image quality. But there are too few size options, only providing Ø1/2" and Ø25 mm. In industry applications, the clear aperture of lens are usually 30~40 mm. Is there any possibility that you provide anti-reflection ND filters with a diamter of 33 mm? jpolaris
 (posted 2023-08-17 05:43:01.0) Thank you for contacting Thorlabs. Requests for customizations such as larger-diameter versions of our optics can be made by emailing us at techsupport@thorlabs.com. I have reached out to you directly to discuss the feasibility of this request. Shadia Chowdhury
 (posted 2023-02-16 10:25:43.867) Dear Sir/Madam,
Is there any polarization-dependent loss of these filters? If yes can you please specify it? Because the purpose I bought these filters is polarization sensitive, that is why I need to know exactly how much the polarization changes during the transmission of the laser beam.
Thanks cdolbashian
 (posted 2023-02-17 11:08:00.0) Thank you for reaching out to us with this inquiry. These absorptive filters are made from isotropic NG4 glass. Besides the expected effects derived from the Fresnel equations, you should not expect to see any phase/polarization-related effects. I have reached out to you directly to discuss your concerns and application. Bob Wang
 (posted 2022-09-30 08:33:29.56) Following up on the comment about the damage thresholds below, we are planning on using an even higher power laser. The average power can reach 1.5 W and the peak power 180 kW. The pulse width is 100 fs and repetition is 80 MHz. We are planning to use these filters to reduce the power output immediately upon laser output, where the beam diameter is 2 mm. Can this product withstand fluences that high? If not, can you recommend one of your products that can? Thanks! cdolbashian
 (posted 2022-10-31 01:08:21.0) Thank you for reaching out to us with this inquiry Bob! Unfortunately though, we have not tested our optics under high speed pulses such as these. At this time, we cannot really say for sure whether or not our filters would be damaged by such a source. Alternatively, perhaps you would consider our wedged beamsplitter, which produces multiple refracted beams of different fractional amounts of the source beam, and is designed for higher-power lasers. (https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_ID=6249) Cristina Amaya
 (posted 2022-06-21 16:20:10.673) Dear Thorlabs team,
can you recommend me which lens mount to use to mount the NE20B-B filter (25 mm in diameter)? Can I use for example a 1" mount and retaining rings to fix it?
Best regards, jdelia
 (posted 2022-06-22 12:56:52.0) Thank you for contacting Thorlabs. The NE20B-B can be mounted in the LMR1(/M) and held in place using the included SM1RR retaining ring. Giuseppe Napolano
 (posted 2022-03-08 09:50:03.3) I noticed that damage thresholds are not available for these ND filters. Are the filters suitable for high frequency lasers, e.g. 50kHz? I was considering a 905nm laser, with 2.5ns pulse length, 28W peak power, 3.5 mW average power, 85umx10um spot. jdelia
 (posted 2022-03-09 03:53:43.0) Thank you for contacting Thorlabs. Based on the information you have provided, it should be fine to use your laser with these filters. Jindřich Vondruška
 (posted 2021-10-01 03:51:37.59) The RoHS certificate is not available! Pleas repair it. YLohia
 (posted 2021-10-11 02:51:04.0) Thank you for contacting Thorlabs. The RoHS certificate has been repaired and reuploaded. Linas Svilainis
 (posted 2021-05-28 10:13:14.517) Damage threshold for NE510B-B ...NE530B-B series is not given. Does it means that there is no LIDT for these ND filters? YLohia
 (posted 2021-06-09 02:26:59.0) Thank you for contacting Thorlabs. That's correct, we currently do not have LIDT for these filters. While we don't have formal damage thresholds for these, given the low average power, we would expect these filters to be fine for your input specs of 905 nm, 120 W peak, 100 ns, 10 Hz, 220 um x 10 um spot jochen.philippi
 (posted 2014-09-24 16:05:02.983) Where can i find the refraction index of NE60B-B near 1000um wavelength ?
Thanks !
Jochen jlow
 (posted 2014-09-25 09:09:50.0) Response from Jeremy at Thorlabs: The glass used in the filter is NG1 from Schott. I will contact you directly for this info. |