Infrared Window Transmission
Refractive Indexes for IR Windows
Material
Barium Fluoride
Cesium Bromide
Cesium Iodide
Calcium Fluoride
Germanium
Lithium Fluoride
Magnesium Fluoride
Potassium Bromide
Potassium Chloride
Sapphire
Silicon
Silver Bromide
Silver Chloride
Sodium Chloride
Sodium Fluoride
Strontium Fluoride
Thallium Bromide
Thallium Bromide-Chloride KRS6
Thallium Bromide-Iodide KRS5
Thallium Chloride
Zinc Selenide
Zinc Sulphide
n
at wavelength µm
1.45
1.66251
1.73916
1.399
4.003
1.39
No = 1.379 Ne = 1.391
1.526
1.454
1.755
3.4179
2.31
1.980
1.49482
1.238
1.439
2.338
2.1767
2.37069
2.193
2.40
2.2
5
10
10
5
10
0.5
0.5
10
10
1
10
0.5
10
10
10
0.5
10
10
10
10
10
10
Transmission Range
Wavelength (µm)
Reproduced with permission of Optovac Corporaton
Z-86
Z