Zinc Selenide Biconcave Lens PZE06-
Zinc selenide biconcave lens is used to change the diffusivity of the converging beam. The two sides have equal curvature radii and are used for beam expansion and projection. It has the ability to withstand thermal shock, making it an optical material in high-power CO2 laser systems. The hardness is only 2/3 of the multispectral level ZnS, and the material is relatively soft and prone to scratches. The refractive index is high, and it needs to be coated with a high hardness anti reflective film on its surface for protection. UM OPTICS can provide a diameter of 2-300mm and a thickness of 0.12-60mm (accuracy can reach 20-10,1)/ 10L@633nm ）Zinc selenide biconcave lenses.
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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） |
| Irregularity [@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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