It's fabricated by special color glass material. Color Glass Filters are designed by their manufacturers to transmit and/or absorb different wavelengths of light. Tian Cheng optics can supply a full range of filters. They are short pass, long pass, bandpass, ultraviolet, infrared, heat absorbing, and color temperature conversion filters. There are colored glass filters like blue/yellow/red/purple/green/ orange glass lens filters. We use material by China to Schott, Hoya, and other manufacturers to process them.
Color Glass from Schott or Equivalent
+0.00, -0.15 mm
60-40 Scratch And Dig
< 3 arc Minute
1λ per 25 mm @632.8 nm
<0.25 mm x 45°
Color Glass Filter Standard Products:
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No. 1567 Liu Ying Lu, Kuan Cheng District, Chang Chun, P.R. China