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
 

All UV and IR materials come through the inspection at our optical laboratory and are thoroughly tested for transmission, crystallographic orientation, birefringence and internal impurities.

Here you can find our specifications for the finished optics:

  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