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Windows

Optical Windows are flat, plane-parallel plates that are often used as protective barriers for electronic sensors or detectors from outside environments. Optical Windows should be selected based on the material transmission or mechanical properties of the substrate. Optical windows do not cause change in the magnification of a system.

Parameter

Standard

High Precision

Material

BK7, B270,Float Glass, FS, UVFS, CaF2, MgF2,Sapphire or other

Dimension tolerance

+0.0/-0.2 mm

+0.0/-0.1 mm

Tc tolerance

±0.3 mm

±0.1 mm

Clear aperture

85%

90%

Surface quality

60-40 S-D

20-10 S-D

Surface flatness

1/2λ @ 632.8 nm

1/8λ @ 632.8 nm

Deviation

±3 arc min

±1 arc min

Coating

Uncoated, available upon request


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