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 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.

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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