Material selection guide. UV and Infrared optical materials.

Alkor Technologies manufactures optical components made of the Infrared materials, crystals and Fused Silica. Our materials cover the entire spectral range from the UV through Far Infrared.

Crystal

Transmission band, µm

Index of refraction (nd)
Abbe Number (vd)
Density (g/cm3)
Softening Temperature °С
Knoop Hardness
Diameter range, mm

Thickness range, mm

0.2-10
1.474
4.89
1550
82
4-220
0.4 - 50
0.25-20
1.527
33.6
2.75
730
7
5-101.6
0.5-80
0.2-3
1.458
67.7
2.21
1000
500
4-300
0.3-100
0.15-10
1.434
95.1
3.18
800
158.3
4-220
0.4-50
0.3-15
1.491
42.9
2.17
801
18.2
4-200
1-50
0.12-7
1.413
106.2
3.18
1255
415
4-50.8
0.4-50
0.12-5
1.391
3.18
867
100
4-76.2
0.4-20
0.6-20
2.403
N/A
5.27
250
120
4-80
0.5-30
1.2-8
3.422
N/A
2.33
1500
1150
4-140
0.4-50
2-16
4.003
N/A
5.32
936
780
4-180
0.4-50
0.3-4
1.768
72.2
3.98
2273
2200
4-200
0.5-20
0.3-18
1.49
1.98
776
7.2
4-200
1-50
visible
4-300
0.4-50
 

Alkor Technologies provides a range of high quality custom infrared optical components specifically suited to infrared wavelengths for a host of IR applications.  A range of materials are available for use from 2.6µm to 45µm, however some materials such as Lithium Fluoride, Calcium Fluoride and Magnesium Fluoride work efficiently in deep UV and other materials such as low OH IR fused quartz is also suited to visible and NIR spectrums.

Our high quality Infrared optical components that are available as custom solutions include windows, prisms, spherical, meniscus and diamond turned lenses and ground blanks. We also provide custom solutions for a range of IR optical filters, IR polarisers, IR beamsplitters and IR gas cells.

  Size tolerance,mm Parallelism Flatness

Surface quality

Standard
+0, -0.2
3 arc. min
1 lambda at 0.63µm
60/40
Achievable
+0, -0.02
10 arc.sec
Lambda/10 at 0.63 µm
10/5