The Polarization Rotator is a wire grid polarizer combined with a mounted mirror placed at an adjustable distance behind the polarizer. It is designed to take an incoming linearly polarized signal and adjust the polarization elliptically.
Free Standing Wire Grid Polarizers
- These polarizers are made of 10 µm, 15 µm or 20 µm tungsten wire wound on a circular frame with spacing ranging from 25 µm to 200 µm.
|Polarizer Model||Wire diameter / Wire spacing (mm)||Clear aperture / External diameter (mm)|
|G25 x 10-S||10 / 25||40 / 50|
|G30 x 10-S||10 / 30||40 / 50|
|G30 x 10-L||10 / 30||88 / 98|
|G45 x 10-S||10 / 45||40 / 50|
|G45 x 10-L||10 / 45||88 / 98|
|G50 x 20-S||20 / 50||40 / 50|
|G50 x 20-L||20 / 50||88 / 98|
|G60 x 15-S||15 / 60||40 / 50|
|G60 x 15-L||15 / 60||88 / 98|
|G80 x 15-S||15 / 80||40 / 50|
|G80 x 15-L||15 / 80||88 / 98|
|G100 x 20-S||20 / 100||40 / 50|
|G100 x 20-L||20 / 100||88 / 98|
|G200 x 20-S||20 / 200||40 / 50|
|G200 x 20-L||20 / 200||88 / 98|
Thin Film Polarizers
Thin Film Terahertz Polarizers are designed for applications in the 0.1-3.0 THz range. The polarizers consist of any array of metal stripes fabricated on a polymer membrane using an ultrafast laser micromachining technique. Typical stripe widthand spacing are about 15um. THz thin film polarizers provide performance comparable to free-standing wire grids, such as G25S and G30S, made of 10um wires spaced by 25um and 30um respectively.
The main advantage of thin film THz polarizers is significantly larger clear aperture – up to 85mm in diameter. For comparison, the G25S and G30S free-standing wire grid polarizers are only available with clear apertures of 40mm.
|METAL STRIPE WIDTH||15m|
|CLEAR STRIPE WIDTH||15um|
We carry two types of rotating holders for the wire grid polarizers or thin film polarizers.
Model RH1 is designed for 4″ diameter polarizers, and enables a 360° rotation.
Model RH2 is designed for 4″ diameter polarizers, and enables 2-axis adjustments and 360° rotation.