High Precision CO2 Znse Lens 97% Transmission for Laser Cutting Machine Zinc Selenide Lens

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Product Overview

Description


Zinc selenide has low absorption on infrared wavelength and can transmit visible light. It is the first-choice material to make infrared lens, windows, output coupling mirrors and beam expanders. In high power applications, it is critical to strictly control the absorption and internal defects of the material. Therefore, it not only needs the optical polishing technology that brings minimal damage to the optical components, but also the optical thin film coating of the highest quality is needed. The absorption rate of the material is tested by CO2 laser vacuum heat measurement technology. Our quality assurance department will provide testing according to customer requirements, and carry out certification on the specific optical components. Generally, the polishing diameter of zinc selenide optical components is 5 to 300 mm. According to customer requirements, we can produce optical components within 300 mm in diameter, and less than 25 mm in thickness. Zinc selenide has no hygroscopicity and it has stable chemical properties (unless treated with strong acid).


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ZnSe Transmission Charts Thermo-Optic Coefficient @ Various Wavelengthsdn/dT (10-5°C-1)


  Material Property


 






















Optical Property



Volume Absorption Coefficient @ 10.6µm



<= 0.0005 cm-1



Thermo-Optical Coefficient @ 10.6µm



61 x 10-6/°C



Inhomogeneity Of Refractive Index @ 632.8 nm



< 3 x 10-6




 























Thermal Property


 

Thermal Conductivity @ 20° C



0.18 W/cm/°C



Specific Heat



0.356 J/g/°C



Linear Expansion Coefficient @ 20° C



7.57 x 10-6/°C




 






























Mechanical Property



Young Modulus



67.2 GPa (9.75 x 106 psi)



Rupture Modulus



55.1 MPa (8,000 psi)



Knoop Hardness



105-120 kg/mm2



Density



5.27 g/cm3



Poisson’S Ratio



0.28




 





























































































































































Wave Length (µm)



Refractive Wavelength



Wave Length (µm)



Refractive Wavelength



Wave Length (µm)



Refractive Wavelength



Wave Length (µm)



Refractive Wavelength



0.54



2.6754



1.8



2.4496



7.4



2.4201



13



2.385



0.58



2.6312



2.2



2.4437



7.8



2.4183



13.4



2.3816



0.62



2.5994



2.6



2.4401



8.2



2.4163



13.8



2.3781



0.66



2.5755



3



2.4376



8.6



2.4143



14.2



2.3744



0.7



2.5568



3.4



2.4356



9



2.4122



14.6



2.3705



0.74



2.5418



3.8



2.4339



9.4



2.41



15



2.3665



0.78



2.5295



4.2



2.4324



9.8



2.4077



15.4



2.3623



0.82



2.5193



4.6



2.4309



10.2



2.4053



15.8



2.3579



0.86



2.5107



5



2.4295



10.6



2.4028



16.2



2.3534



0.9



2.5034



5.4



2.4281



11



2.4001



16.6



2.3487



0.94



2.4971



5.8



2.4266



11.4



2.3974



17



2.3448



0.98



2.4916



6.2



2.4251



11.8



2.3945



17.4



2.3387



1



2.4892



6.6



2.4235



12.2



2.3915



17.8



2.3333



1.4



2.4609



7



2.4218



12.6



2.3883



18.2



2.3278





 

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0.0114 s.