- Wide acceptance angle
- High polarization purity
- Suitable for low power applications
Foster Polarizers: The p-polarized ray passes undisplaced. The s-polarized ray is reflected and is transmitted through a hole in the wall of the enclosure. A modification involves mirror coating this top surface to reflect the s-polarized beam down at 90° to the transmitted beam. Only the transmitted ray has high polarization purity. Cemented: low power handling.
As with all of our optics, we will gladly provide these items custom designed to your particular requirements.
Foster Polarizers are made of two calcite prisms cemented together. The output beams separate at an angle of 45°.
Although both beams are available for use, only the undisplaced beam is of the exceptionally high polarization purity generally associated with crystal polarizers. The 45° reflected beam has a much lower degree of polarization.
