Optical Windows

< Back WINDOWS Optical Windows are applied to isolate different physical environments while allowing light to pass. When selecting windows you should consider materials, transmission, scattering, wavefront distortion, parallelism and resistnace to certain environments.Single layer or multilayer anti-reflecting coatings on optical windows are available upon request.
Material	Properties	Application
BK7	Transmission Range; 330-2100nm. Refractive Index: 1.5164@588nm	Good performance over visible and near IR specrum for most applications
Fused Silica	Transmission Range; 185-2500nm Refractive Index: 1.4858@308nm Low Thermal Expansion Coefficient: 0.54 x 10- 6K	Better performance from UV to IR spectrum. It is also the best choice for thermal resistance.
Sapphire	Transmission Range; 180-4500nm Refractive Index: 1.755@1000nm Strong Hardness	Suitable for scratch resistance applications with better transmission over the wide range spectrum. Can be made thinner if necessary
Calcium Fluoride	Transmission Range; 170-7800nm Refractive Index: 1.399@5000nm Little Hydroscopic Susceptability High Thermal Expansion Coefficient: 18.85 x 10-6K	Applications for a wide range spectrum and is particularly useful for IR laser applications.