免费看欧美性生活黄片-成年人免费在线看大片-精品少妇人妻中文字幕-日本一区二区免费在线视频

Neutral density filter

關(guān)閉
產(chǎn)品咨詢
客服熱線:400-700-9997

Product Description

 

Neutral density filters uniformly attenuate the intensity of light over a broad spectral range. Attenuation is accomplished by either absorption using light absorbing glass or by a combination of absorption and reflection using a thin-film metal coating. Neutral density filters can attenuate spectral regions selected from 250 to 2500nm. The level of attenuation can be specified from optical density (OD) 0.04 to 4.0 where OD is defined as -log10 (T).
 
Overall attenuation may be increased by stacking neutral density filters serially in the light path. For example, a 0.5 (OD 0.5) neutral density filter placed in series with a 0.3 (OD 0.3) neutral density filter will produce total attenuation of OD 0.8 (10-0.8) or 16% transmission. A six-filter set of 0.1, 0.3, 0.5, 1.0, 2.0, and 3.0 optical densities can achieve a graduated range of spectrally neutral attenuation from OD 0.1 to 6.9. See OD conversion table below.
Filter Description
Neutral density filters are defined by:
Optical Density—the level of neutral transmission across the wavelength region;
Optical Density—OD = -log10 (T).
●Specifications
smission Tolerances (at 550nm):
   For OD <1.0 ±0.05 OD from nominal
   For OD 1.0–3.0 ±0.1 OD from nominal
   For OD >3.0 ±0.2 OD from nominal
Neutrality Tolerance The variation in optical density from 400 to 700nm 
will be less than 10% of the OD measured at 550nm
Outer Dimension Tolerance +0, -0.25mm (+0, -0.01”)
Clear Aperture 4mm less than nominal outside dimension
Maximum Thickness 4mm
Substrate Material Optical quality glass or UV-grade quartz
Surface Quality 80/50 scratch/dig per Mil-O-13830A
Operating Temperature Range -60°C to +80°C
Coating Vacuum-deposited metallic alloy, if not absorption glass type
Construction Either (a) exposed, front-surface metalic coating, 
(b) metallic coating laminated and protected in a 
moisture-resistant assembly, or (c) absorption glass

 

亚洲精品日韩国产欧洲精品| 人妻一区日韩二区国产| 青青草视频在线免费观看91| 青草在线视频免费观看| 日韩在线一区二区31| av资源新版在线天堂少妇| 午夜美女精品福利视频| 91久久国产亚洲精品| 国产精彩在线视频成人在线| 日韩经典三级精品自拍| 亚洲一区二区三区色偷偷| 久久国产精品午夜亚洲欧美| 亚洲精品成人自拍视频| 蜜桃精品一区二区在线| 极品粉嫩学生国产在线观看| 日本中文有码视频在线观看| 日本一区中文字幕在线| 中文字幕亚洲精品99| 黑人玩弄人妻一区二区| 91亚洲视频在线免费观看| 日本一区中文字幕怎么用| 四虎永久精品在线播放| 国产精品入口在线播放| 91在线高清免费观看| 日本办公室三级在线观看| 亚洲美女激情四射网站| 国产一区二区三区免费大片在线| 人人玩精品人妻少妇性性色| 国产精品国产三级农村av| 91人妻人人做人人爽九色| 成人在线观看播放视频| 精品日韩一区二区三区中文字幕| 私人尤物视频在线观看| 国产夫妻打炮视频自拍| 四虎视频在线观看免费| 国产亚洲麻豆一二三区| 日日噜噜噜夜夜噜噜噜| 亚洲一本一道久久香蕉| 五月天亚洲综合小说网| 一级女性全黄久久生活片免费| 国产大片一区二区三区|