Specifications:
| Materials | CVD ZnSe crystals | Diameter Range | ~200mm |
| Diameter Tolerance | +0.0/-0.2mm | Thickness Tolerance | +/-0.2mm |
| Surface Quality | 60/40 S/D | Fringes (N) | 3 |
| Irregularity (delta N) | 1 | Centration | 3' |
| Chamfer | 0.1-0.3mmx45 degree | Coatings | AR/AR@7-14micro BBAR/BBAR@3-12 micro |
Physical and Optical Properties:
| Transmission Range | 0.6 to 21.0μm | Refractive Index | 2.4028 at 10.6μm |
| Reflection Loss | 29.1% at 10.6μm (2 surfaces) | Absorption Coefficient | 0.0005 cm-1 at 10.6μm |
| Reststrahlen Peak | 45.7μm | dn/dT | +61 x 10-6 /°C at 10.6μm at 298K |
| dn/dμ = 0 | 5.5μm | Density | 5.27 g/cc |
| Melting Point | 1525°C (see notes below) | Thermal Conductivity | 18 W m-1 K-1 at 98K |
| Thermal Expansion | 7.1 x 10-6 /°C at 273K | Hardness | Knoop 120 with 50g indenter |
| Specific Heat Capacity | 339 J Kg-1 K-1 | Dielectric Constant | n/a |
| Youngs Modulus (E) | 67.2 GPa | Shear Modulus (G) | n/a |
| Bulk Modulus (K) | 40 GPa | Elastic Coefficients | Not Available |
| Apparent Elastic Limit | 55.1 MPa (8000 psi) | Poisson Ratio | 0.28 |
| Solubility | 0.001g/100g water | Molecular Weight | 144.33 |
| Class/Structure | HIP polycrystalline cubic, ZnS, F43m |
Zinc Selenide (ZnSe) Lenses, with their broad transmission wavelength range (0.6 µm to 16 µm), are often oriented for manipulating and focusing light in MWIR and LWIR spectra. The low absorption, miniature chromatic dispersion, and high thermal shock resistance made ZnSe lenses prevalent for various infrared applications requiring high thermal robustness and minimal signal transmission loss/distortion like CO2 high-power lasers, thermal imaging, military, and medical equipment, etc. Zinc selenide (ZnSe) has a large refractive index, contributing to the capable focusing of IR radiation. Zinc selenide is soft with a low scratch resistance and is chemically sensitive thus extra caution is required during cleaning, handling, and mounting.
North Optics provides custom zinc selenide lenses. Tailored to meet specific needs, North Optics lenses offer diverse coating options, including AR coatings at 3-5μm and 8-12μm, BBAR coating across 3-12μm, or customizable coatings to suit individual requirements. Moreover, we also provide specialized ZnSe Lenses for CO2 Laser. Experience superior quality and precision with our range of ZnSe Lenses, tailored to elevate your optical endeavors.
Curves:
1. Transmission Curve of the ZnSe with No Coating
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