Appel Roland K, Dyer Chris D
QinetiQ, Farnborough, UK.
Appl Opt. 2002 Apr 1;41(10):1888-93. doi: 10.1364/ao.41.001888.
An achromatic device to rotate optical polarization by 90 degrees is described. This is based on a series of reflecting surfaces that rotates incoming light about the optical axis and translates it such that the exiting light is collinear. Polarization rotation is achieved by rotation of the optical beam, as opposed to the more common approach of phase retardation by use of birefringent elements. For broadband operation from the UV to the near infrared, the device was constructed by use of total internal reflection in three fused-silica glass components. Losses are minimized with interstitial surfaces designed to be angled close to Brewster's angle.
描述了一种将光偏振旋转90度的消色差装置。该装置基于一系列反射面，这些反射面使入射光绕光轴旋转并进行平移，使得出射光共线。与使用双折射元件进行相位延迟这种更常见的方法不同，偏振旋转是通过光束的旋转来实现的。为了实现从紫外到近红外的宽带操作，该装置由三个熔融石英玻璃部件利用全内反射构建而成。通过将间隙表面设计成接近布儒斯特角的角度，可将损耗降至最低。
