Challener W A
Appl Opt. 1996 Dec 1;35(34):6845-6. doi: 10.1364/AO.35.006845.
Half wave plates are often used to rotate the plane of polarization by 90° at one wavelength. To rotate the plane of polarization over a range of wavelengths, Fresnel rhombs may be used. Fresnel rhombs, however, exhibit significant deviation from precisely 180° retardation over any broad wavelength range. This note describes two prism (or mirror) designs which rotate the incident polarization exactly 90° at all wavelengths. In one case the incident beam direction is deviated by 90°, while in the other case the incident beam is transmitted undeviated.
半波片常用于在一个波长下将偏振面旋转90°。为了在一系列波长上旋转偏振面，可以使用菲涅耳菱形棱镜。然而，菲涅耳菱形棱镜在任何较宽的波长范围内都表现出与精确的180°相位延迟有显著偏差。本说明描述了两种棱镜（或反射镜）设计，它们在所有波长下都能将入射偏振精确旋转90°。在一种情况下，入射光束方向偏离90°，而在另一种情况下，入射光束无偏折地透射。
