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Zinc Selenide (ZnSe) plano-convex (PCX) lenses are designed for focusing or collimation applications in the mid-wave and long-wave infrared spectroscopy. These lenses have a volume absorption coefficient of <0.0005cm-1 at 10.6µm wavelength and are available uncoated or with a variety of broadband antireflection coating options. The 8-12µm coating is ideal for use with CO2 lasers and thermal camera applications, while the dual-band 3-12µm coating is suitable for hyperspectral applications.
The ZnSe plano-convex lens has an irregularity of <λ/20 at 10.6µm wavelength, a surface quality of 40-20, and a surface roughness of <50Å. Three diameter options are available, with effective focal lengths ranging from 12.7mm to 200mm.
| Substrate | Infrared ZnSe |
| Surface quality | 40-20 |
| Power (P-V) @ 632.8nm : | λ/10 |
| Irregularity (P-V) @ 632.8nm : | λ/20 |
| Clear aperture（mm） : | 90 |
| Focal length (nm) : | 10.6 |
| Bulk Absorption Coefficient (cm1) : | <0.0005 @ 10.6μm |
