China Optics:Windows

Windows are used to isolate different physical environments while allowing light pass. When selecting windows you should consider the following properties, transmission, scattering, wavefront distortion, parallelism and resistance to certain environment. ChinaOpticsNet offers a wide range of different materials and different degree of precision windows. Special materials are available upon request.
ChinaOpticsNet provides varieties of single layer or multilayer anti-reflecting coating on optical windows. Please refer to the Coating chapter for more information.

WINDOW MATERIALS PROPERTIES:

Material	Properties	Application
BK7	Transmission Range: 330-2100nm Refractive Index: 1.5164@588nm	Good performance over visible and near IR spectrum of most application.
Fused silica	Transmission Range: 185-2500nm Refractive Index: 1.4858@308nm. Low Thermal Expansion Coefficient:0.54*10-6K	Better performance from UV to IR spectrum. Also, it is the best choice for resistance thermal application.
Sapphire	Transmission Range : 180-4500nm Refractive Index: 1.755@1000nmStrong hardness	Suit for scratch resistance application with better transmission over the wide range spectrum. It can be made much thinner.
Calcium Fluoride	Transmission Range: 170-7800nm Refractive Index: 1.399@5000nm Little Hygroscroptic SusceptibilityHigh Thermal Expansion Coefficient:18.85*10-6K	It is applicable for wide rang spectrum, and it is particularly useful for IR laser application.

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Fused Silica Windows	BK7 Windows	Sapphire Windows
Calcium Fluoride Windows