Blue glass optical filter and coating optical filter
Optical filters are mainly used to eliminate the infrared light and trim the incoming light，as the blue wavelength has a higher penetration rate，better penetration than red -orange glass filters，the use of precision optical coating technology on the optical substrate alternately，coated with high and low refractive index optical film，to achieve high visibility visible light，near-infrared light-cut optical filter，it's mainly used for video cameras, automatic optical detection, optical instruments and so on
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