It's fabricated by special color glass material. Color Glass Filter 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 orange lens filter. We use material by China to Schott, Hoya, and other manufacturers to process them.

Specification of Colored glass light filters

Material Color Glass from Schott or Equivalent

Diameter Tolerance +0.00, -0.15 mm

Thickness Tolerance ±0.2 mm

Clear Aperture >85%

Surface Quality 60-40 Scratch And Dig

Parallelism < 3 arc Minute

Wavefront Distortion 1λ per 25 mm @632.8 nm

Protective Bevel