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Window

 
 
 

Window is a piece of glass with plane parallel surfaces used to admit light into an optical system and to exclude dirt and moisture.
 
There can be extreme differences of temperature, pressure, humidity and other parameters on either side of the window. When selecting windows the optical, mechanical and thermal properties must be considered according to the intended use: It should be of high purity and polish in order not to affect the optical system.

When large pressure differences are anticipated across the window extra thickness will be required to hold the flatness and parallelism specifications.

Windows may also be used as coating substrates for use in a wide range of applications. TEMTO provides varieties of single layer or multiplayer anti-reflecting coating on optical windows. Please refer to Coatings chapter for more information.

The common materials we are manufacturing are: BK7, UV Fused Silica, Crystal Quartz, Sapphire, MgF2, CaF2, Silicon, Germanium and other crystal. Please contact us with details of your requirement.


Manufacturing Tolerances:
Tolerances
Commercial quality
Precision quality
Manufacturing limits
Glass Quality
nd
0.001
0.0005
Melt controlled
vd
0.8%
0.3%
Melt controlled
Diameter(mm)
+0.00/-0.10
+0.00/-0.05
+0.00/-0.01
Thickness(mm)
0.10
0.02
0.005
Scratch-Dig
80-50
40-20
10-5
Power (fringe)
5
1
0.1
Irregularity (fringe)
2
0.5
0.05
Parallelism (arc min)
3-5 arc minutes
1 arc minutes
Facility controlled
Bevel
<0.25mm x 45or upon requirement
Facility controlled
Coating
Upon requirement
Note: The general tolerance specifications above provide a guideline regarding manufacturing capabilities for optics ranging in size from 1-600mm. The manufacturing limits are not absolute; tighter tolerances may be possible. Part specific tolerances may vary depending on component size, shape, and/or material.
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