标题: [分享]喷一喷，减少杂散光 美国Avian发黑涂料 [打印本页] 作者: light_all 时间: 2005-12-20 21:43 标题: [分享]喷一喷，减少杂散光 美国Avian发黑涂料 在许多光学应用中，要尽量减少杂散光，经常要对光学元件进行发黑处理，许多发黑工艺需要用电镀、化学等处理方法，费时费力，美国Avian 研制的Avian Black-S发黑剂可以应用在大部分底漆上，直接喷涂即可，非常方便，可水洗，许多性能超出美国军标的要求。
应用：
Telescope baffles
Cold shields
Instrument baffles
Detector assemblies
Avian Black-S Coating 简介
Avian Black-S coating is a spray on, two part water based urethane coating that exhibits low reflectance over a wide wavelength range. The water-borne coating exhibits very low gloss and is quite durable compared to most low reflectance coatings. It is easily mixed and may be applied with standard spraying equipment. Cleanup is easily done with water and detergent.
The coating passes and exceeds Mil spec for live agents and durability. It is a low VOC coating (<1.8 lbs/gallon) and is non-flammable as applied.
The reflectance is <3.5% over most of the UV-Vis-NIR and appx. 3% over most of the range.
Avian Black-S
Typical 8 degree/Hemispherical Reflectance Data
Wavelength Reflectance Wavelength Reflectance Wavelength Reflectance
250 .040 800 .032 1600 .031
300 ..034 900 .030 1800 .033
400 ..032 1000 .029 2000 .035
500 .031 1100 .029 2200 .037
600 ..031 1200 .029 2400 .038
700 .032 1400 .030 2500 .040
Physical Properties:
Gloss: 1%< @ 60°, <3.5% @ 85° Flexibility: Pass 1/8" Mandrel 180° bend
Viscosity: 70-75 KU Pot Life: 4 hours
Coverage: 640 sq. ft. /gallon at 1 mil thickness
Air Quality: <1.8 lbs/gallon V.O.C.
Weathering: QUV >1000 hrs. Xenon Weatherometer >2000 hrs. no change
Chemical Resistance: Water >168 hrs. immersion
Hydrocarbon TT-S-735 Type III: <168 hrs. immersion
10% Acetic Acid: 1 hour spot
The coating may be applied over most primers. Typically a 1-2 mils thickness gives full opacity.
Avian Black-S is available as a kit that makes appx. 1.5 liters of coating.
Avian 公司同时提供
Avian-DS Black 和 Avian-EP Black 两种发黑工艺OEM 服务，
Avian-DS Black
Avian-DS is even more absorbent of light. It is the blackest material we've seen in almost twenty years in this field. Coating is limited to parts fabricated from aluminum. This is a batch process, so small lots tend to be very expensive but the coating is economical for large lots or OEM quantities. This coating can only be applied to aluminum substrates.
Avian-EP Black
Avian-EP Black is an electrochemical process that can be applied to almost any substrate including plastic or glass. The coating is highly diffuse but somewhat fragile, so its use in applications that require handling of the optical surface are not recommended.
Optically, Avian-EP Black is very highly absorbent in the UV-Vis-NIR and has better range than Avian-DS Black (above). The coating remains 'black' out to 7-8 microns. 作者: lightall 时间: 2008-9-1 09:37
