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Si Window

Silicon( Si) is a good IR material , it can be used from 1.2 to 7 microns, its peak transmission range is in 3-5 micron. Silicon can be used in some circumstances where weight is a concern as that the density of Silicon is similar to optical glass. Silicon material is widely used in security and military applications. 

Transmission Range: 1200 nm~7000 nm
Hermal Expansion Coefficient: 2.55x10-6/K
Density: 2.33g/cm3


Specifications

Material

Silicon

Dimension Tolerance

+0.0/-0.1mm

Thickness Tolerance

±0.2mm

Clear Aperture

>90%

Parallelism

<1arc minutes

Surface Quality

60/40 or better

Flatness

<λ /[email protected] or better

Chamfer

Protected <0.5mmx45deg

Coating

None, per your request



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