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