Zinc Sulfide (ZnS) Lenses
High Fracture Strength: Both types of ZnS lenses exhibit high fracture strength, making them suitable for use in demanding environments.
Mechanical Robustness: ZnS lenses are mechanically robust, providing durability and longevity in various applications.
Broad Transmission Range: Multispectral ZnS (Cleartran) lenses offer a broad transmission range from the visible (VIS) to the infrared (IR) region (0.4 to 14 µm).
Chemical Inertness: Multispectral ZnS lenses are chemically inert, ensuring stability and resistance to harsh chemical environments.
Low Scattering: Multispectral ZnS lenses exhibit low scattering, enhancing the quality and clarity of transmitted signals.
Applications: LWIR optics, Multispectral optics, military systems, etc.
Kingwin Optics provides ZnS lenses made of Chemical Vapor Deposition (CVD) Zinc Sulfide or Multispectral Zinc Sulfide (also known as Cleartran or water-clear ZnS). Both types of ZnS lenses are favored for use in extreme conditions due to their high fracture strength and mechanical robustness.
Physical and Optical Properties:
| Materials | CVD ZnS or Multispectral ZnS (Cleartran) |
| 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 |
| Transmission Range | 0.37 to 13.5 μm |
| Refractive Index | 2.20084 at 10 μm |
| Reflection Loss | 24.7% at 10 μm (2 surfaces) |
| Absorption Coefficient | 0.0006 cm-1 at 3.8 μm |
| Reststrahlen Peak | 30.5 μm |
| dn/dT | +38.7 x 10-6/°C at 3.39 μm |
| dn/dμ = 0 | n/a |
| Thermal Conductivity | 27.2 W m-1 K-1 at 298K |
| Melting Point | 1827°C (See notes below) |
| Hardness | Knoop 160 with 50g indenter |
| Thermal Expansion | 6.5 x 10-6 /°C at 273K |
| Dielectric Constant | 88 |
| Specific Heat Capacity | 515 J Kg-1 K-1 |
| Density | 4.09 g/cc |
| Youngs Modulus (E) | 74.5 GPa |
| Shear Modulus (G) | n/a |
| Bulk Modulus (K) | n/a |
| Elastic Coefficients | Not Avalailable |
| Apparent Elastic Limit | 68.9 MPa (10,000 psi) |
| Poisson Ratio | 0.28 |
| Solubility | 65 x 10-6 g/100g water |
| Molecular Weight | 97.43 |
| Class/Structure | HIP polycrystalline cubic, ZnS, F42m |
Advantages of ZnS Lenses:
- High Fracture Strength: Both types of ZnS lenses exhibit high fracture strength, making them suitable for use in demanding environments.
- Mechanical Robustness: ZnS lenses are mechanically robust, providing durability and longevity in various applications.
- Broad Transmission Range: Multispectral ZnS (Cleartran) lenses offer a broad transmission range from the visible (VIS) to the infrared (IR) region (0.4 to 14 µm).
- Chemical Inertness: Multispectral ZnS lenses are chemically inert, ensuring stability and resistance to harsh chemical environments.
- Low Scattering: Multispectral ZnS lenses exhibit low scattering, enhancing the quality and clarity of transmitted signals.
Applications:
- LWIR Optics: CVD ZnS lenses are optimized for the LWIR spectrum (7 to 14 µm), making them ideal for long-wave infrared applications.
- Multispectral Optics: Multispectral ZnS lenses are suitable for applications spanning from the visible to the infrared range (0.4 to 14 µm), offering versatility in various optical systems.
- Military Systems: Both types of ZnS lenses are used in military systems for their durability, robustness, and high performance in extreme conditions.
Custom Solutions:
Kingwin Optics offers custom ZnS lenses tailored to meet specific needs. These lenses are available in various shapes, sizes, and coatings to enhance their performance in targeted applications. Kingwin Optics ensures precision and high quality in their ZnS lenses, making them suitable for demanding optical applications.
ZnS lenses from Kingwin Optics provide exceptional performance in extreme conditions, with high fracture strength, mechanical robustness, and broad transmission ranges. CVD ZnS lenses are ideal for LWIR applications, while Multispectral ZnS lenses (Cleartran) offer versatility across the visible to infrared spectrum. Custom solutions from Kingwin Optics ensure optimal performance and reliability for various optical applications.
