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Zinc Selenide (ZnSe)
Laser & Optical Grade

OVERVIEW

Phoenix Infrared is one of a select few companies in the world producing laser grade zinc selenide using the Chemical Vapor Deposition (CVD) process. Phoenix Infrared personnel have over 30 years experience producing zinc selenide and are internationally known for producing some of the highest quality ZnSe in the world. With its low bulk absorption at 10.6 microns, zinc selenide is the optical component material of choice for high powered CO2 lasers and CO2 marking lasers. Its index of refraction homogeneity and uniformity offers excellent optical performance for use as protective windows or optical elements in high resolution forward looking infrared (FLIR) thermal imaging equipment. This material can also be used for windows and lenses in medical and industrial applications, such as thermometry and spectroscopy.

PRODUCTS

For optics producers, we offer SMTY blanks in diameters ranging from 5.5mm to 305mm and thicknesses from 1mm to 25mm. Phoenix Infrared can also offer shaped parts –generated, polished, & coated.We can provide lenses, windows, beamsplitters, prisms, wedges, and other optical components according to customer specifications and drawings. We can even offer one off specialty optics.

Chemical Properties

Chemical Properties

ZnSe

Density, (20 °C)

5.27 g/cm3

Hardness (20 °C)

105 kg/mm2

Flexural Strength (20 °C)

Flexural Strength (260 °C)

750 psi

10,500 psi

Young’s Modulus (20 °C)

Young’s Modulus (260 °C)

10.2 Mpsi

8.9 Mpsi

Thermal Conductivity  (20 °C)

Thermal Conductivity  (260 °C)

0.16 W/cm-k

0.08 W/cm-k

Thermal Expansion (20-170 °C)

7.57 ppm/K

Specific Heat (20 °C)

0.339 J/g-K

Grain size

50-70 microns

Dielectric Constant (20 °C)

8.976

Loss Tangent  (20 °C)

0.0017

Poisson's Ratio  (20 °C)

0.28

Refractive Index

Wavelength µm

Refractive
Index

1
2
3
4
5
6
7
8
9
10
11
12
13
14

2.4892
2.4462
2.4376
2.4331
2.4295
2.4258
2.4218
2.4173
2.4122
2.4065
2.4001
2.3930
2.3850
2.3762

Optical Properties

Optical Properties

ZnSe

Max Transmittance 1 µm
Max Transmittance 10 µm

69.2%
70.9%

Absorption Coefficient

0.63 µm
2.7 µm
3.8 µm
5.3µm
10.6µm

x 10-3 cm -1

100 1.5
1.5
0.4
0.5

Index of inhomogeneity 10.6µm

3 ppm

Thermo-optic Coefficient

(dn/dT) @293K

x 10-5 K -1

0.63 µm
1.15 µm
3.39 µm
10.6µm

10.6
7.0
6.2
6.1
> Laser & Optical Grade
> Evaporant

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