CaF2 Polarizer

Download IR Polarizers Datasheet (PDF, 552 KB)


Substrate material CaF2
Spectral range, mm 1 - 9
Typical operation aperture, mm 25 x 25
Standard holder size at typical aperture, mm D42 x 8
Maximal operation aperture, mm 50 x 50/D 50
Grooves per mm 2400
Transmission efficiency K1 (average), % >70
Transmission of unwanted radiation K2, % 1-2 @ 1.5 mm
<0.5 @ 2 mm
<0.1 @ 3-9 mm
Degree of polarization (K1-K2)/(K1+K2), % 94-97 @ 1.5 mm
>98 @ 2 mm
>99 @ 3-9 mm
Extinction ratio E=K1/(2*K2) 15-35 @ 1.5 mm
70 @ 2 mm
350 @ 3-9 mm

 Transmission efficiency K1

Transmission of unwanted radiation K2

Degree of polarization P

 Standard items can be ordered from our stock. The polarizers with non-standard sizes, shape and operational wavelength region are available on request.