|Download IR Polarizers Datasheet (PDF, 552 KB)|
|Download THz Polarizers Datasheet (PDF, 264 KB)|
For operation in FIR and THz regions we supply polyethylene polarizers designed to polarize radiation from 7 microns to MM waves. They are the sort of diffraction gratings and operate in transmission. The polarizer grating is made by forming grooves of a triangle profile on the substrate and subsequent deposition of a metal coating (aluminum) on one of the groove facets.
Advantages of polyethylene grid polarizers compared to free-standing wire grid polarizers:
Tab. 1 Parameters of polyethylene polarizers.
* For square shape polarizer maximal aperture size can be higher, up to 110 x 110 mm .
Fig. 1. Transmission efficiency.
Fig. 2. Transmission of unwanted radiation.
Fig. 3. Degree of polarisation.
Fig. 4. Transmission of efficiency.
Sizes and shapes
Polyethylene polarizers are produced using the ruled grating technique.
The grid is ruled onto large size material, which is subsequently cut. Thus clear aperture can be round or, on customer's request – square or rectangular.
Standard clear aperture (CA) of polarizers is D25 mm, which is available from our stock.
For quotation and delivery please fill in our request form.