Wollaston Prism
沃拉斯顿棱镜
The Wollaston prism is a polarizing beam splitter, preserving both the O- and E-rays. It is usually made from calcite or quartz.
沃尔拉松棱镜是一种偏振光分束器，能够保持O光和E光。它通常由方解石或石英制成。
The Wollaston prism is made up of two right triangle prisms with perpendicular optic axes. At the interface, the E-ray in the first prism becomes an O-ray in the second and is bent toward the normal. The O-ray becomes an E-ray and is bent away from the normal. The beams diverge from the prism, giving two polarized rays. The angle of divergence of these two rays is determined by the wedge angle of the prisms. Commercial prisms are available with divergence angles from 15° to about 45°. They are sometimes cemented with glycerine or castor oil, and sometimes not cemented if the power requirements are high.
Wollaston棱镜由两个具有垂直光轴的直角三棱柱组成。在界面处，第一个棱柱中的E光变为第二个棱柱中的O光，并向法线方向偏折。O光变为E光，并远离法线方向偏折。光线从棱镜中发散，形成两束偏振光。这两束光的发散角由棱镜的楔角决定。商业棱镜的发散角范围为15°到约45°。它们有时用甘油或蓖麻油粘接，有时不粘接，如果功率要求较高的话。
| Application in CD player
CD播放器中的应用 | Polarizing prisms
偏振棱镜 |
Polarization concepts
Reference
Hecht
Sec. 8.4
索引 偏振概念 参考 Hecht 第8章第4节
| HyperPhysics***** Light and Vision
HyperPhysics ***** 光与视觉 | R Nave |
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