Zinc Selenide Aspheric Lens PAsSE-
Zinc selenide aspherical lenses have the characteristics of low absorption and thermal shock resistance, and are commonly used in thermal imaging systems. They can also be used in some visible light optical systems. It has a high numerical aperture and can collect a large amount of light energy, including quantum lasers (QCL). It can be coated with MgF2, UV-AR, UV-VIS, VIS-EXT, VIS-NIR, NIR I, NIR II, Telecom NIR, SWIR, SWIR, YAG-BBAR and other film systems. UM OPTICS has complete production equipment and experience in optical crystals, components, and coating, and can provide high-quality zinc selenide non spherical transparent mirrors.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Dia | 2-300 mm |
| Focal Length | 15-5000 mm |
| Center Thickness | 0.12-60 mm |
| Edge Thickness | 0.12-60 mm |
| Design Wavelength | Custom |
| Radius of Curvature | Custom |
| Surface Quality | 60-40 |
| Diameter Tolerance | +0.0/-0.1 |
| Thk Tolerance | ±0.1 mm |
| Substrate Material | Zinc Selenide（ZnSe） |
| PV [@632.8nm] | λ/4 |
| Centering | <3′ |
| Clear Aperture | >90% |
| Coating | Uncoated |
| REACH | Compliant |
| ROHS | Compliant |
| Crystal Structure [Substrate Material：Zinc Selenide（ZnSe）] | Cubic |
| Density [Substrate Material：Zinc Selenide（ZnSe）] | 5.27 g/cm³ |
| Resistivity [Substrate Material：Zinc Selenide（ZnSe）] | ~10¹² |
| Melting Point [Substrate Material：Zinc Selenide（ZnSe）] | 1525 ℃ |
| Chemical Purity [Substrate Material：Zinc Selenide（ZnSe）] | 99.9996 % |
| Thermal Expansion [Substrate Material：Zinc Selenide（ZnSe）；@273K] | 7.1*10⁻⁶@273K |
| Thermal Expansion [Substrate Material：Zinc Selenide（ZnSe）；@373K] | 7.8*10⁻⁶@373K |
| Thermal Expansion [Substrate Material：Zinc Selenide（ZnSe）；@473K] | 8.3*10⁻⁸@473K |
| Thermal Conductivity [Substrate Material：Zinc Selenide（ZnSe）；@298K] | 18.0@298K |
| Specific Heat Capacity [Substrate Material：Zinc Selenide（ZnSe）；@298K] | 0.339@298K |
| Knoop Hardness [Substrate Material：Zinc Selenide（ZnSe）] | 110 kg/mm² |
| Bending Strength [Substrate Material：Zinc Selenide（ZnSe）] | 55 Mpa |
| Young's Modulus [Substrate Material：Zinc Selenide（ZnSe）] | 67.2 GPa |
| Poisson's Coefficient [Substrate Material：Zinc Selenide（ZnSe）] | 0.28 |
| Transmission Range [Substrate Material：Zinc Selenide（ZnSe）] | 0.5-22μm |
| Refractive index inhomogeneity △n/n [Substrate Material：Zinc Selenide（ZnSe）；@632.8μm] | <3*10⁻⁶@632.8μm |
| Absorption Coefficient [Substrate Material：Zinc Selenide（ZnSe）；@1300nm] | 5.0*10⁻³@1300nm |
| Absorption Coefficient [Substrate Material：Zinc Selenide（ZnSe）；@2700nm] | 7.0*10⁻⁴@2700nm |
| Absorption Coefficient [Substrate Material：Zinc Selenide（ZnSe）；@3800nm] | 4.0*10⁻⁴@3800nm |
| Absorption Coefficient [Substrate Material：Zinc Selenide（ZnSe）；@5250nm] | 4.0*10⁻⁴@5250nm |
| Absorption Coefficient [Substrate Material：Zinc Selenide（ZnSe）；@10600nm] | 5.0*10⁻⁴@10600nm |
| Thermal light coefficient [Substrate Material：Zinc Selenide（ZnSe）；298-358k；@632.80nm] | 1.07*10⁻⁴@632.80nm |
| Thermal light coefficient [Substrate Material：Zinc Selenide（ZnSe）；298-358k；@1150nm] | 7.0*10⁻⁵@1150nm |
| Thermal light coefficient [Substrate Material：Zinc Selenide（ZnSe）；298-358k；@3390nm] | 6.2*10⁻⁵@3390nm |
| Thermal light coefficient [Substrate Material：Zinc Selenide（ZnSe）；298-358k；@10600μm] | 6.1*10⁻⁵@10600μm |
| Refractive Index [Substrate Material：Zinc Selenide（ZnSe）；@620nm] | 2.5994 |
| Refractive Index [Substrate Material：Zinc Selenide（ZnSe）；@10600nm] | 2.4028 |
| Refractive Index [Substrate Material：Zinc Selenide（ZnSe）；@1000nm] | 2.4892 |
| Refractive Index [Substrate Material：Zinc Selenide（ZnSe）；@13000nm] | 2.385 |
| Refractive Index [Substrate Material：Zinc Selenide（ZnSe）；@3800nm] | 2.4339 |
| Refractive Index [Substrate Material：Zinc Selenide（ZnSe）；@14600nm] | 2.3705 |
| Refractive Index [Substrate Material：Zinc Selenide（ZnSe）；@5000nm] | 2.4295 |
| Refractive Index [Substrate Material：Zinc Selenide（ZnSe）；@16600nm] | 2.3487 |
| Refractive Index [Substrate Material：Zinc Selenide（ZnSe）；@7000nm] | 2.4218 |
| Refractive Index [Substrate Material：Zinc Selenide（ZnSe）；@17800nm] | 2.3333 |
| Refractive Index [Substrate Material：Zinc Selenide（ZnSe）；@9000nm] | 2.4122 |
| Refractive Index [Substrate Material：Zinc Selenide（ZnSe）；@18200nm] | 2.3278 |
| Damage Threshold [Substrate Material：Zinc Selenide（ZnSe）；Incidence Mode：Normal Incidence] | >20 J/cm² |
| Damage Threshold [Substrate Material：Zinc Selenide（ZnSe）；Incidence Mode：Brewster's Corner] | >15 J/cm² |
Applications
Datasheet
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