Zinc Selenide (ZnSe) Lenses
Broad Transmission Range: ZnSe lenses transmit efficiently across a wide spectral range from 0.6 µm to 16 µm, covering both visible and infrared wavelengths.
Low Absorption and Minimal Chromatic Dispersion: ZnSe lenses exhibit low absorption and minimal chromatic dispersion, which ensures high signal integrity and minimal distortion.
High Thermal Shock Resistance: ZnSe lenses can withstand significant temperature variations, making them suitable for high-power laser applications and thermal imaging.
Large Refractive Index: With a refractive index of 2.4 at 10.6 µm, ZnSe lenses are highly effective in focusing and manipulating IR radiation.
Customizability: Kingwin Optics offers custom ZnSe lenses with various coating options, including AR coatings at 3-5µm and 8-12µm, BBAR coating across 3-12µm, and specialized coatings for CO₂ lasers.
Applications: CO₂ lasers, thermal imaging, IR spectroscopy, military optics, medical equipment.
Zinc Selenide (ZnSe) Lenses are widely used in various infrared (IR) applications due to their broad transmission range and excellent optical properties. These lenses are particularly effective in the MWIR (3-5 µm) and LWIR (8-12 µm) spectra, making them ideal for high-power laser systems, thermal imaging, military, and medical equipment.
Physical and Optical Properties:
| Materials | CVD ZnSe crystals |
| Diameter Tolerance | +0.0/-0.2mm |
| Thickness Tolerance | +/-0.2mm |
| Surface Quality | 60/40 S/D |
| Chamfer | 0.1-0.3mmx45 degree |
| Coatings | AR/AR@7-14micro BBAR/BBAR@3-12 micro |
| Transmission Range | 0.6 to 21.0μm |
| Refractive Index | 2.4028 at 10.6μm |
| Reflection Loss | 29.1% at 10.6μm (2 surfaces) |
| Absorption Coefficient | 0.0005 cm-1 at 10.6μm |
| Reststrahlen Peak | 45.7μm |
| dn/dT | +61 x 10-6 /°C at 10.6μm at 298K |
| dn/dμ = 0 | 5.5μm |
| Thermal Conductivity | 18 W m-1 K-1 at 98K |
| Melting Point | 1525°C |
| Hardness | Knoop 120 with 50g indenter |
| Thermal Expansion | 7.1 x 10-6 /°C at 273K |
| Density | 5.27 g/cc |
| Specific Heat Capacity | 339 J Kg-1 K-1 |
| Bulk Modulus (K) | 40 GPa |
| Youngs Modulus (E) | 67.2 GPa |
| Apparent Elastic Limit | 55.1 MPa (8000 psi) |
| Poisson Ratio | 0.28 |
| Dielectric Constant | n/a |
| Shear Modulus (G) | n/a |
| Elastic Coefficients | Not Available |
| Solubility | 0.001g/100g water |
| Molecular Weight | 144.33 |
| Class/Structure | HIP polycrystalline cubic, ZnS, F43m |
Advantages of Zinc Selenide Lenses:
- Broad Transmission Range: Zinc Selenide lenses efficiently transmit wavelengths from 0.6 µm to 16 µm, covering a wide spectral range ideal for various IR applications.
- Low Absorption and Chromatic Dispersion: ZnSe lenses exhibit low absorption and minimal chromatic dispersion, ensuring high signal integrity and minimal distortion.
- High Thermal Shock Resistance: These lenses can withstand significant temperature variations, making them suitable for high-power laser and thermal imaging applications.
- Large Refractive Index: With a refractive index of 2.4 at 10.6 µm, ZnSe lenses effectively focus and manipulate IR radiation.
- Customizability: Kingwin Optics offers custom ZnSe lenses with various coating options, including AR coatings at 3-5µm and 8-12µm, BBAR coating across 3-12µm, and specialized coatings for CO₂ lasers.
Applications:
- CO₂ Lasers: Used in high-power CO₂ laser systems for industrial cutting, welding, and engraving.
- Thermal Imaging: Integrated into thermal cameras and imaging systems for security, surveillance, and industrial inspections.
- IR Spectroscopy: Essential for spectroscopic instruments used in chemical analysis and material characterization.
- Military Optics: Applied in various military equipment for infrared detection and imaging.
- Medical Equipment: Used in medical diagnostic devices that operate in the IR spectrum.
Custom Solutions:
Zinc Selenide lenses are versatile and high-performing optical components suitable for a wide range of IR applications. Their broad transmission range, low absorption, and high thermal shock resistance make them ideal for use in CO₂ lasers, thermal imaging, military optics, and more. With custom solutions from Kingwin Optics, ZnSe lenses can be tailored to meet specific requirements, ensuring optimal performance in various demanding environments.
Kingwin Optics provides a wide range of custom Zinc Selenide lenses tailored to meet specific needs. These lenses are available in various shapes and sizes, with specialized coatings to enhance performance in specific applications. Kingwin Optics ensures superior quality and precision in their ZnSe lenses, making them suitable for demanding optical endeavors.
