Frohlich M W
Stain Technol. 1986 May;61(3):139-43. doi: 10.3109/10520298609110723.
In the standard polarizing microscope, birefringent material appears bright only if its optic axis is oblique to the axes of the polarizer and analyzer filters; consequently, an object may be visualized as several disconnected bright regions. This confusing appearance is avoided if the crossed plane polarizers of the conventional microscope are replaced by circular polarizers of opposite handedness. All orientations of the optic axis in the focal plane then become equivalent; objects generally appear uniformly bright. Ordinary microscopes are easily modified to use this technic with readily available components.
在标准偏光显微镜中，双折射材料只有在其光轴与起偏器和检偏器滤光片的轴倾斜时才会显得明亮；因此，一个物体可能会呈现为几个不相连的明亮区域。如果将传统显微镜的交叉平面偏振器换成相反旋向的圆偏振器，就可以避免这种令人困惑的现象。此时焦平面内光轴的所有取向都变得等效；物体通常看起来均匀明亮。普通显微镜很容易通过使用现成的组件进行改装以采用这种技术。
