High Efficiency Infrared Prism , Customized CVD ZnSe Anamorphic Prisms
Brand Name:Wuhan Siwer Optics
Minimum Order Quantity:4 pieces
Delivery Time:5-7weeks
Payment Terms:T/T, Western Union
Place of Origin:Wuhan,China
Price:520 USD/piece
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Wuhan Hubei China
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Building 7, No. 116, Gaoxin Avenue, Donghu New Technology Development Zone, Wuhan City, Hubei Province
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CVD ZnSe Anamorphic Prisms
Zinc Sulphide (ZnS) is a widely used IR transmitting material in windows, lenses and prisms. The material transmits at about 50% between 0.4 -12μm before dropping off to zero transmission around 15μm. Its low absorbance in the IR spectrum makes it desirable for CO2 lasers operating at 10.6μm. Zinc Sulphide has a pale yellow to clear appearance and a hardness of HK160. Although the material is resistant to thermal shock, it is not recommended for harsh environments.
Lasers usually feature an elliptical beam profile. While, mostly a circular beam shape is required, like mode-matching to an external resonator, adapting beam size to pass a small aperture of an isolator, and etc. Anamorphic Prism Pairs are used to transform elliptical laser diode beams into nearly circular beams by magnifying the elliptical beam in one dimension.
Optical Properties of ZnSe Prisms
| Material | CVD Zinc Selenide |
| Diameter Tolerance | +0.0/-0.1 mm |
| Thickness Tolerance | ±0.1 mm |
| Surface Quality | 40/20 Scratch-Dig |
| Surface Flatness (Plano Side) | λ/2 at 633nm |
| Surface Irregularity (Peak to Valley) | λ/4 at 633nm |
| Angle tolerance | 3 arcmin (5 seconds according to customer requirements) |
Transmittance of ZnSe window(T=2mm)
CVD ZnSe properties
| Chemical Formula | ZnSe |
| Molecular Weight | 144.33 |
| Crystal Class | Cubic, hexagonal |
| Crystal Structure | Polycrystalline |
| Density, g/cm3 at 293 K | 5.27 |
| Melting Temperature, K | 1790 |
| Thermal Conductivity, W/(m K) at 300 K | 18 |
| Thermal Expansion, 1/K | |
| at 173 K | 5.6 x 10-6 |
| at 273 K | 7.1 x 10-6 |
| at 473 K | 8.3 x 10-6 |
| Specific Heat, cal/(g K) at 296 K | 0.081 |
| Debye Temperature, K | 246 |
| Bandgap, eV | 2.7 |
| Solubility in water at 298 K | 0.001 g/100 g H2O |
| Knoop Hardness, kg/mm2(100 g load) | 105 |
| Young's Modulus, GPa | 70 |
| Bulk Modulus, GPa | 40 |
| Poisson's Ratio | 0.28 |
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Infrared Elements Selection Guide
High Efficiency Infrared Prism , Customized CVD ZnSe Anamorphic Prisms
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