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
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Chemical Vapor Deposition(CVD)
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Melting Point
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1700℃
|
Transmission Band
|
3-12μm
|
Bulk Absorption Coefficient
|
<0.24cm-1@10.6μm
|
Density
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4.08g/cm3
|
Refractive Index
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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/℃
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Thermal Expansion
|
7.85x10-6/℃ at 20℃
|
Specifications:
Material:
|
ZnS
|
Dimension Tolerance:
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+0.0/-0.1mm
|
Thickness Tolerance:
|
±0.1mm
|
Surface quality:
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60/40
|
Clear Aperture:
|
>85%
|
Flatness:
|
λ/2@633nm
|
Parallelism:
|
3'
|
