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Sapphire Window

Sapphire Window has a excellent transmission in range: 180—4500nm. And the reflective index is 1.77 @1000nm.

The sapphire part is the best choose to withstand strong pressure in optical system.

It is widely used in IR sensors, thermal image, medical and optical measurement systems

Specifications:
Material Anisotropic synthetic sapphire crystal (Al2O3)
Diameter Tolerance +0.0/-0.1mm
Thickness Tolerance ±0.2mm
Clear Aperture >Central 85% of diameter
Surface Quality 60-40 S/D
Parallelism < 1 arc minute
Wavefront Distortion λ/4 per 25mm @632.8nm
Protective Bevel <0.25mm x 45°
Coating Uncoated
Sapphire Window Standard Products:
Part No. φ(mm) T(mm)
12.7 2.0
25.4 3.0

Note: 

Other sizes and coatings are available upon request.

The general tolerance specifications above provide a guideline regarding manufacturing capabilities for optics.

The manufacturing limits are not absolute; tighter tolerances may be possible.

Part specific tolerances may vary depending on component size, shape, and/or material.