• For  windows, domes and lenses for therma-imaging system
  • Standard ZnS, which appears orange, mainly works in Far-infrared region
  • Multi-spectrum ZnS (M-ZnS) shows excellent opticaproperties across the fulband of 0.4-12μm, can be used in Far-, Mid-, Near-infrared and visible regions.
  • Standard ZnS windows, lenses and domes with size up to Ø250×16mm. For M-ZnS, the maximum size is 300×200×15mm

Product Properties

AppellationStandard CVD ZnSMulti-SpectraZns
Maximum dimensions (mm)Ø250×16300×200×15
Transmission Range,(μm)0.6–120.35–12
Refractive Index2.19982.2008
Temperature Change of refractive Index
@ 10.6μm, (10-6℃-1)
5050
Bulk absorption coefficient@10.6μm,(cm-1)≦0.2≦0.2
Rupture modulus,(MPa)103.468

Technical Index

AppellationStandard CVD ZnSMulti-SpectraZnS
Homogeneity of refractive index<3×10-5 @0.6328μm<3×10-5 @0.6328μm
Hardness(knoop),(kg/mm2)210-230160
Rupture modulus,(Mpa)103.468
Young’s Modulus,(GPa)74.574.5
Posson ratio0.290.28
Melting point ,(℃)18301830
Density, (g/cm3)4.094.09
Thermaconductivity, (W/cm.K)0.190.272
Thermaexpansion coefficient, (10-6 ,℃-1 )7.857.85
Specific heat (Ca/g.k.)0.1120.124
Dielectric constant8.358.35

the listed index are from reference book, may be different from our products,
more speciarequirements should be discussed individually.
Specification

Specification

windowCVD ZnSMulti-SpectraZnS
Maximum dimensions(mm)200×300200×300
Tolerance on these dimensions(mm)0.10.1
Minimum thickness(mm)1515
Tolerance on thickness(mm)0.10.1
domeCVD ZnSMulti-SpectraZnS
Caliber(mm)Ф300Ф300
Tolerance on caliber(mm)0.10.1
lensCVD ZnSMulti-SpectraZnS
Diameter(mm)15-20015-200
Tolerance on diameter(mm)Standard: 0.1
Specia: 0.03
Standard:0.1
Specia:0.03
Tolerance on curvatures(mm)Standard:0.5%
Specia:0.05%
Standard:0.5%
Specia:0.05%
Tolerance on center thickness(mm)Standard:0.1
Specia:0.05
Standard:0.1
Specia:0.05

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