ZnSe optics are useful in a wide variety of applications, from infrared radiation collection to laser cutting. The spectral response of ZnSe makes it a particularly good substrate for CO2 laser optics. These optics offer high transmission in the visible range to well past 10 microns, produce good results at 10.6¦Ìm and are easily visually aligned. This is atypical of other substrates designed for this region. Economically priced, plano-convex lenses are ideal for use in laser cutting and welding,
Property of ZnSe
|
Density |
5.264g/cm3 |
|
Hardness |
105Kg/mm2 |
|
Bulk Absorption Coefficient @10.6µm |
¡Ü0.0005 cm-1 |
|
Max.Transmission @2.5-15um |
>70% |
|
Temperature Change of Refractive Index @10.6µm |
61 x 10-6/¡ãC |
|
Refractive IndexInhomogeneity @632.8 nm |
< 3 x 10-6 |
|
Thermal Conductivity @ 20¡ã C |
0.16W/cm/¡ãC |
|
Specific Heat |
0.356J/g/¡ãC |
|
Linear Expansion Coefficient @ 20¡ã C |
7.57 x 10-6/¡ãC |
|
Young¡¯s Modulus |
67.2 GPa (9.75 x 106 psi) |
|
Knoop Hardness |
105-120 kg/mm2 |
|
Poisson¡¯s Ratio |
0.28 |
Main specification
|
Material |
CVD ZnSe |
|
Diameter Tolerance |
+0.0/-0.05-0.1 |
|
Tolerance of center thickness |
+/-0.05-0.1 |
|
Variation of edge thickness |
+/-0.05-0.1 |
|
Clear Aperture |
¡Ý90% |
|
Flatness @633nm |
¦Ë/4 |
|
Surface Quality |
40/20 S/D for Plano
60/40 S/D for CV/CX |
|
Parallelism |
¡Ü3¡¯ |
|
Coating |
AR coating | |
