Nonlinear LBO Crystal

Infrared optics CVD ZnS windows for full band of 0.4-12μm

ZnS is grown by chemical vapor deposition (CVD) method, for windows,domes and lenses for thermal-imaging system.

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CVD ZnS, which appears orange, mainly works in Far-infrared region Multi-spectrum. ZnS (M-ZnS) shows excellent optical properties across the full band of 0.4-12μm, can be used in Far-, Mid-, Near-infrared and visible regions. CVD ZnS windows, lenses and domes with size up to Ø250×16mm. For M-ZnS, the maximum size is 300×200×15mm.


Physical and Optical Properties:

Growing Method
Chemical Vapor Deposition(CVD)
Melting Point
1700℃
Transmission Band
3-12μm
Bulk Absorption Coefficient
<0.24cm-1@10.6μm
Density
4.08g/cm3
Refractive Index
2.200 at 10.6μm
Mohs Hardness
3
Young's Modulus
74.5 GPa
Thermal Conductivity
0.167W/cm/℃ @20℃
Specific Heat
0.112cal/g/℃
Thermal Expansion
7.85x10-6/℃ at 20℃

Specifications:
Material:
ZnS
Dimension Tolerance:
+0.0/-0.1mm
Thickness Tolerance:
±0.1mm
Surface quality:
60/40
Clear Aperture:
>85%
Flatness:
λ/2@633nm
Parallelism:
3'


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