BK7/B270 optical glasses 

    The optical glass is the glass material used in the lens, prism, reflector and windows of optical instruments and optical equipments. The various kinds of optical glass are as the follows: Uncolored optical glass, colored optical glass, laser glass, radiation resistance laser glass, radiation protection laser glass and quartz glass. The uncolored optical glass is commonly regarded as the optical glass, which is one of the general specifications in glasses. There are over 200 kinds of number features in total. Each feature has its own optical constants, uniformity, transparency and chemical durability.

Technical indicators:

1 Surface quality: 0/0, 40/20 ~ 80/50
2 Surface Accuracy: 1/10 in, 1/4 into 2 into
3 Thickness Tolerance: ± 0.01mm ~ ± 0.02mm
4 Parallelism: 5Arc second ~ 1Arc Minute
5 Processing range: up to 0.2mm thickness of the thinnest
6 Coating
7 steel