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

 

亚洲丰满毛茸茸毛茸茸| 销魂美女一区二区三区视频在线 | 亚洲不卡一区二区三区不卡| 久久精品国产精品亚洲艾| av在线免费观看青青草原| 久久久国产精品黄毛片| 岛国av高清大片在线观看| 国产精品色片一区二区| 国产男女生第一次视频| 午夜亚洲大片在线观看| 手机日韩av在线免费观看| 精品日本韩国一区二区三区| 国产精品色午夜免费视频| 国产三级在线观看高清| 果冻国产精品麻豆成人av| 国产精品一亚洲av日韩| 国产精品免费观看在线国产| 大片在线观看视频播放| 夜夜操狠狠操天天摸| 久久精品一区二区三区激情| 日产精品一区二区三区| 国产成人综合怡春院精品| 日韩中文字幕精品人妻| 精品人妻一区二区三区不卡| 加勒比久久精品网址系列| 日本少妇精品一区二区| 精品少妇人妻av一区二区蜜桃 | 午夜天堂精品一区二区| 亚洲国产精品福利一区二区| 国产精品三上悠亚在线| 亚洲精品一品区二品区三| 亚洲国产精品96不卡| av黄色在线免费播放| 在线观看亚洲精品一区二区| 丰满人妻无套内射视频| 久久精品一偷一偷国产| 亚洲熟妇国产熟妇肥婆| 综合久久精品亚洲天堂| 久久亚洲精品人成综合网| 国产午夜福利视频在线播放一区| 国产av网站一区二区三区|