Product Introduction
CVD zinc selenide (ZnSe) boasts high purity, excellent environmental stability, and ease of processing. It exhibits low optical transmission loss and outstanding light-transmitting properties, making it the preferred material for high-power CO2 laser optical components. Additionally, thanks to its uniform refractive index and exceptional consistency, ZnSe is an ideal choice for protective windows and optical elements in forward-looking infrared (FLIR) thermal imaging systems. Beyond that, this infrared material is also widely used as windows and lenses in medical devices, industrial thermal radiation meters, and infrared spectrometers.
Optical properties
|
Through the wavelength range |
Refractive index inhomogeneity (Δn/n) |
Absorption coefficient (1/cm) |
Thermal-optic coefficient dn/dT (1/K, 298–358 K) |
|
0.5 μm – 22 μm |
<3 × 10⁻⁶ @ 632.8 nm |
5.0 × 10⁻³ @ 130 nm |
1.07 × 10⁻⁴ @ 632.8 nm |
|
7.0 × 10⁻⁴ @ 270 nm |
7.0 × 10⁻⁵ @ 1150 nm |
||
|
4.0 × 10⁻⁴ @ 380 nm |
6.2 × 10⁻⁵ @ 339 nm |
||
|
4.0 × 10⁻⁴ @ 5250 nm |
6.1 × 10⁻⁵ @ 1060 nm |
||
|
5.0 × 10⁻⁴ @ 1060 nm |
Refractive index variation with wavelength: (20°C)
|
Wavelength (nm) |
Refractive index (n) |
Wavelength (nm) |
Refractive index (n) |
|
620 |
2.5994 |
10600 |
2.4028 |
|
1000 |
2.4892 |
13000 |
2.385 |
|
3800 |
2.4339 |
14600 |
2.3705 |
|
5000 |
2.4295 |
16600 |
2.3487 |
|
7000 |
2.4218 |
17800 |
2.3333 |
|
9000 |
2.4122 |
18200 |
2.3278 |
Zinc selenide raw material
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