ZnSe Lenses
2020-06-24
Chemically vapor-deposited Zinc Selenide (CVD ZnSe) is a preferred material for optical components in high power CO2 lasers due to its low absorption at 10.6μm. Also, for its excellent optical performance, CVD ZnSe is widely used as windows, lenses and prisms in high resolution FLIR systems.
Optical properties：
Symbol | ZnSe |
Atomic Numbe | Cubic |
Melting Point (℃) | 1520 |
Density (g/cm3) | 5.27 |
Thermal Expansion Coefficient (10-6, ℃-1) | 5.75 |
Youngs Modulus (Gpa) | 67.2 |
Rupture Modulus (Mpa) | ≥75 |
Poisson’s Ratio | 0.28 |
Diameter or length tolerance | Up to +0/-0.01mm |
Thickness tolerance | Up to +/-0.01mm |
Surface figure | Up to λ/20 @632.8nm |
Parallelism | Up to 0.5 arc seconds |
Surface quality | Up to 10-5 Scratch & Digs |
Bevel | <0.2mmx45° |
Coating | According to your request |
Specifications:
ZnSe lenses:
Diameter tolerance | Up to +0/-0.01mm |
Central thickness tolerance | Up to +/-0.01mm |
Surface figure | Up to λ/10 @632.8nm |
Centration | Up to 5 arc seconds |
ETV | ≤0.05mm |
Surface quality | Up to 10-5 Scratch & Digs |
Clear aperture | Up to 100% of the diameter |
Bevel | <0.2mmx45° |
Coating | According to your request |
