Product Introduction
CVD-zinc sulfide boasts high purity, is insoluble in water, has a moderate density, and is easy to process—features that make it widely used in the fabrication of infrared windows, radomes, and optical components for infrared applications. Like zinc selenide (ZnSe), zinc sulfide (ZnS) is also a material characterized by excellent refractive index uniformity and consistency, delivering outstanding image transmission performance across the 8000nm–12000nm wavelength range. Additionally, ZnS exhibits impressive transmittance in the mid-infrared region; however, as wavelengths shorten, both absorption and scattering increase significantly. Compared to zinc selenide (ZnSe), zinc sulfide is more affordable, harder, and possesses twice the fracture strength of ZnSe, while also demonstrating superior resistance to harsh environmental conditions. These properties make it an ideal choice for manufacturing missile radomes and infrared windows in military aircraft.
Optical properties
|
Through the wavelength range |
Refractive index inhomogeneity (Δn/n) |
Absorption coefficient (1/cm) |
Thermal-optical coefficient dn/dT (1/K, 298–358 K) |
|
| CVD Zinc Sulfide | 1000nm---14000nm | <7.3 × 10⁻⁴ @ 10,600 nm |
0.2 @ 10600nm |
4.6 × 10⁻⁵ @ 1150 nm |
|
4.3 × 10⁻⁵ @ 3390 nm |
||||
|
4.1 × 10⁻⁵ @ 10,600 nm |
||||
| Multispectral CVD-Zinc Sulfide | 370 nm—14,000 nm | <0.2 * 10⁻⁴ @ 632.8 nm |
0.2 @10600nm |
5.43 × 10⁻⁵ @ 632.8 nm |
| 4.21 × 10⁻⁵ @ 1150 nm | ||||
| 3.87 × 10⁻⁵ @ 3390 nm |
Refractive Index Variation with Wavelength: CVD-Zinc Sulfide (ZnS) (20°C)
| Wavelength (nm) | Refractive index (n) | Wavelength (nm) | Refractive index (n) | Wavelength (nm) | Refractive index (n) |
| 620 | 2.355 | 7000 | 2.232 | 11400 | 2.18 |
| 1000 | 2.292 | 9000 | 2.212 | 12200 | 2.167 |
| 3800 | 2.253 | 9800 | 2.203 | 13800 | 2.132 |
| 5000 | 2.246 | 10600 | 2.192 | 14200 | 2.126 |
Zinc sulfide ingot
CVD zinc sulfide boasts high purity, is insoluble in water, has a moderate density, and is easy to process, making it widely used in the fabrication of infrared windows, radomes, and infrared optical components.
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