Zinc Selenide Window Infrared Spectroscopy Instrument Optical Polycrystalline Lenses Are Not Easily Deliquescent | Инструменты

Product Name:Zinc selenide window
Packing:Single price


Zinc selenide is a yellow transparent polycrystalline material with a crystalline particle size of about 70μ m and a light transmission range of 0.5-15μ M. The synthesis by chemical vapor deposition (CVD) method has no impurity absorption and very low scattering loss. Because the absorption of 10.6-mu; m wavelength light is very small, it becomes the preferred material for fabricating optical devices in high power CO2 laser system. In addition, it is widely used in different optical systems in the whole transmission band.

Zinc selenide material has high thermal shock resistance, making it a better optical material in high power CO2 laser system. Hardness is only 2/3 of multi-spectral ZnS, the material is soft and easy to scratch, and the refractive index of the material is high, so it is necessary to coat high hardness anti-reflection film on its surface to protect and obtain high transmittance. Scattering is very low in the range of common spectra. When used in high power laser devices, it is necessary to strictly control the bulk absorption and internal structural defects of the materials, and adopt the polishing technology with minimum damage degree and the coating technology with higher optical quality.

Zinc selenide material is used to fabricate all-mirror, half-mirror, beam expander, flat-field lens, mid-infrared lens, far-infrared 10.6Um/CO2 power laser, various flat-convex lens, convex and concave crescent cutting lens, gold-plated mirror, circular polarizer, beam expander, flat-field lens, etc. It is widely used in laser, medicine, astronomy and infrared night vision.

Physical properties of zinc selenide materials:
Optical properties:
 

Optical properties:
Bulk absorption coefficient:10.6 μm 0.0005/cm
Refractive index temperature change index:10.6μm 61x10-6/°C
Refractive index inhomogeneity:632.8nm < 6X10-6
 

Thermodynamic properties
Heat conductivity: 0.18W/cm/°C
Specific heat  : 0.356J/g/°C
Linear expansion coefficient:20°C 7.57x10-6/°C
 

Mechanical properties:
Young's modulus :6.85X1011 dyne/cm2

Fracture detection(Rupture Modulus):5.7X108 dyne/cm2
Knoop hardness:110-130Kg/mm2
density:5.27g/cm3

Poisson ratio:0.28
Transmission range (micron) : 0.5-22
Inhomogeneity of refractive index:632.8 nanometer < 3 x 10-6
Temperature Coefficient of Refractive Index:10.6 micron 61 x 10-6
Volumetric absorption coefficient:10 micron/cm 0.0004
Melting point, degree:1520
Hardness (Nup), Kg/Square Millimeter 112
Density, g/cmm 5.27
Fracture modulus, MPa 55.2
Young's Elasticity Coefficient, Giga Pa 67.2
Fracture toughness Mpa/m1/20.5