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Zinc Selenide (ZnSe) Lenses SKU: 561-6765
• Low absorption in the red end of the visible spectrum • Not hygroscopic • Quite stable in the laboratory environment Zinc selenide (ZnSe) is the most popular material for infrared applications. Due to a very wide transmission range covering 0.6-22 µm chemical vapor…
Variant specifications
| Specification | Value |
|---|---|
| Diameter | ø 76.2 mm |
| Focal length | 254 mm |
| Type | Plano-Convex |
Shared product specifications
These specifications apply across the Zinc Selenide (ZnSe) Lenses product family.
Physical Properties
| Crystal type | cubic |
| Density, g / cm³ | 5.27 |
| Melting point, °C | 1525 |
| Refractive index @ 8-13 µm | n = 2.417-2.385 |
| Refractive index @ 10.6 µm | n = 2.403 |
| Transmission band, µm | 0.6÷22 |
| Bulk absorption coefficient cm⁻¹@ 10.6 µm | 0.6-1.0×10⁻³ |
| Coefficient of linear thermal expansion, °C-¹ | 8.56×10⁻⁶ |
| Material | ZnSe |
| Surface quality | 40-20 scratch & dig (MIL-PRF-13830B) |
| Diameter tolerance | +0.0 -0.13 mm |
| Thickness tolerance | ±0.1 mm |
| Focal length tolerance | ±2% @ 10.6 µm |
| Coating | both surfaces AR coated @ 10.6 µm, / R ≤ 0.5% per surface |
Classification
| Wavelength | UV|IR |
Product brochures
Shared documentation for the complete product family.