Yangzhou UJ Optical Element Co.,Ltd.

Sapphire window for watches

    Sapphire Window
    Shape: Round, Rectangle, Square
    Customized Size
DETAILS
 

Optical glass windows are designed for using in optical systems to separate two environments while passing a particular spectral range between them. 

It has high wavefront distortion, high transmission and high parallelism which ensure system’s imaging and high precision.

Sapphire Window

Optical glass window Material - Sapphire
MaterialSapphire
Properties

Transparent Range: 180nm ~ 4500nm

Mohs Hardness: 9

Refractive Index: 1.755@1000nm

Density: 3.98g/cm3

Application

Sapphire has good mechanical strength, and it is also transparent from UV to IR spectrum. 

So, it is always used as window material where scratch resistance is required.

For example for watches.

Spectral curvesapphire window curve.jpg
Parameters for optical glass window
MaterialSapphire
Dimension Tolereance
±0.1mm
Clear Aperture>90%
Parallelism

Standard: 3 arc minute

High Precision: 10 arc seconds

Surface Quality

Standard: 60/40

High Precision: 20/10

Wavefront Distortion

Standard: λ@633nm per 25mm

High Precision: λ/8@633nm per 25mm

ChamferProtected <0.5mmx45deg
CoatingAvailable upon request



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