The Foster polarizer is 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.
As with all of our optics, we will gladly provide these items custom designed to your particular requirements. As an alternative, we offer a selection of standard items as specified below.
|Order No.||L/A||Extinction Ratio||Angular Field (°)||CA phi a (mm)||O.D. phi d (mm)||L ± 0.1 (mm)|