Filters are designed by their manufacturers to transmit or absorb different wavelengths of light. Optical filter is widely used in medical instrument, finance, metallurgical, photography,cameras, navigation, military, biography instrument, optical instrument andscience field etc.
China star optics can supply a full range of filter. They are shortpass, longpass, bandpass, ultraviolet, infrared, heat absorbing, and color temperature conversion filters. We use material by China to Schott, Hoya, and other manufacturers to process them. Metallic films, colored glasses and thin dielectric films filter are all available per your requirements.

Filters are designed by their manufacturers to transmit or absorb different wavelengths of light. And optical filters are widely used in scientific experiments and industrial applications where that change is necessary. China star optics can supply a full range of filters,Color Separation Filter,Neutral Density Filter,Filter,Short/Long Wave Pass Filter,Bandpass Filter and Interference Filter.
Specification of our color filter as follow:
Material:Filter Glass,BK7
Dimension: 4mm-160mm - 0.20mm
Squares/Rectangles:1mm-165mm
Thickness:0.5mm-4mm 
Wavelength range:190nm to 4.5um
Thickness tolerance:+/-0.01mm-0.1mm
Edges:Fine 
Ground Flatness:Up to Lambda/10
Surface quantity: 80/50-20/10 Scratch/Dig