Colorless Optical Glass BK-7
Colorless optical glass mainly includes BK-7 and B270. Other colorless optical glass materials can be selected and precisely fabricated to your requirements. Optical glass projection windows: German Schott optical glass receives a vacuum-deposited antireflection coating, giving transmission more than 7% higher than ordinary glass windows and reaching 99%. It serves as an isolation window between cinema projection booths and auditoriums. Typical sizes include 300*400 and 400*600; larger sizes can be customized. Polarizing projection windows: the company develops and produces large-aperture 400*600 and 600*1200 polarizers, including linear polarizers (PL) and circular polarizers (CPL, also called annular polarizers). Linear polarizers have 41.5% transmission and 99.8% extinction; circular polarizers have 30% transmission and 99.9% extinction.
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