Introduction: Zinc Selenide is the most popular material for infrared applications. It can transmit from 0.6um to 20 um. With its low absorption at IR wavelengths and visible transmission ZnSe based components including windows, output couplers, Prisms and lenses are widely used especially for high power IR laser.
Main Application：material processing, astronomy, night and IR vision systems etc..
Main Properties：
|
Growing Method
|
Chemical Vapor Deposition(CVD)
|
|
Melting Point
|
1525℃
|
|
Transmission Band
|
0.6-20um
|
|
Bulk Absorption Coefficient
|
5X10-4cm-1@10.6um
|
|
Density
|
5.268g/cm3
|
|
Refractive Index
|
2.4015 at 10.6um
|
|
Young’s Modulus
|
67.2 GPa
|
|
Thermal Conductivity
|
0.18W/cm/℃
|
|
Specific Heat
|
0.356J/g/℃
|
|
Thermal Expansion
|
7.57x10-6/℃ at 20℃
|
CASTECH supply ZnSe with：
|
Diameter
|
+0.0/-0.10mm
|
|
Length
|
+/-0.2mm
|
|
Chamfer
|
0.20+/-0.10mm @ 45°
|
|
Surface Figure (power/irregularity) at 0.63µm
|
1.0 fringe/0.5 fringe
|
|
Parallelism
|
< 40 arc Seconds
|
|
Perpendicularity
|
< 5 arc min
|
|
Surface Quality
|
40/20Scratch/Dig
|
Refractive Index
|
Wavelength, µm
|
2.75
|
5.00
|
7.50
|
9.50
|
11.0
|
12.5
|
13.5
|
15.0
|
16.0
|
16.9
|
17.8
|
18.6
|
19.3
|
20.0
|
|
Refractive Index
|
2.44
|
2.43
|
2.42
|
2.41
|
2.40
|
2.39
|
2.38
|
2.37
|
2.36
|
2.35
|
2.34
|
2.33
|
2.32
|
2.31
|
