The colored glass filter is an optical filter that selectively transmits or blocks specific wavelengths of light through the principle of bulk absorption. Its coloration originates from the incorporation of specific metal oxides or rare-earth ions during the glass melting process. These impurity ions determine the final spectral characteristics of the filter.
Rugged and durable: Excellent weatherability with scratch-resistant surfaces.
Angle-insensitive performance.
Limited spectral performance.
| Material | colored glass |
| Diameter Tolerance | +0.0,-0.2 mm |
| Thickness Tolerance | +0.0,-0.1 mm |
| Parallelism | ＜1' |
| Transmitted Wavefront Error | λ/2@633nm |
| Surface Quality | 40/20-60/40 S/D |
