Products


AR-Coated Windows

Windows are frequently used in optical systems to separate the environment in one part of the system from another, such as to seal vacuum or high-pressure cells. Because the infrared transmitting material has a high index of refraction, an anti-reflection coating is typically applied to windows to minimize losses due to reflections.

For guidelines about calculating the proper thickness for a window to withstand a given pressure, see our Pressure Loading tutorial.

Below is the typical transmission of an AR coated, ZnSe window at 0° incidence:

Specification

Specifications
Standards
Dimensional Tolerance
Diameter: +0.000”-0.005”
Thickness: +0.005“-0.010”
Edge Thickness Variation (ETV)
<= 3 arc minutes
Clear Aperture (polished)
90% of diameter
Surface Figure (power/irregularity) at 0.63µm
1.0 fringe/0.5 fringe
Scratch-Dig
20-10
AR Coating Reflectivity per Surface at 10.6µm
< 0.20%
 

Part Numbers

Part #
Description
Diameter
(inches)
Diameter
(mm)
Thickness
(inches)
Thickness
(mm)
185217
ZnSe
0.25
6.35
0.080
2.03
568604
ZnSe
0.375
9.53
0.080
2.03
162879
ZnSe
0.50
12.7
0.080
2.03
457172
ZnSe
0.75
19.05
0.080
2.03
735199
ZnSe
1.0
25.4
0.080
2.03
617035
ZnSe
1.0
25.4
0.120
3.05
834076
ZnSe
1.1
27.94
0.120
3.05
184651
ZnSe
1.5
38.1
0.120
3.05
883636
ZnSe
2.0
50.8
0.200
5.08
243559
ZnSe
2.5
63.5
0.250
6.35
616847
ZnSe
3.0
76.2
0.250
6.35
AR coated windows are available in other substrates and as uncoated windows. We also offer AR coatings at other wavelengths or wavelength bands. Contact a II-VI sales representative for exact specifications.

 

Applications
Materials Processing, CO2 Laser Microprocessing, High Power CO2 Laser Processing, Resonator Optics, Windows, INFRARED

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