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  SILICON WINDOWS
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Silicon is another material that is frequently utilized in infrared systems – however due to absorption it is not suitable for CO2 transmitting optics. Silicon can be used from 1.2 to 7μm but only has about 50% transmission in this range. Because of this, we have added an AR coating to enhance the performance from 3-5μm. With a density of 2.329g/cm3, Si is ideal for use in systems where weight is a concern.

Specifications:
MaterialSi(Optical Grade)
Clear Aperture              90% of Diameter
Dimensional Tolerance           +0.0/-0.1mm
Thickness Tolerance                 ±0.1mm
Surface Quality                       40-20
Surface Accuracy               1λ@ 632.8nm
Parallelism                      <3 arc min

 
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