介绍一种根据出射光平行度要求计算斜方棱镜面形误差的方法。

A calculation method to calculate the surface shape error of rhombic prism according to parallelism demand of emergent beam is introduced.

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塑料指示头内表面制成多棱镜面，能反射各种角度的光线，非常醒目。

The inner surface of the plastic indicating head is made into a polygonal mirror surface, so the direction indicating device which can reflect light rays of various angles is very conspicuous.

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And if the prism is of sufficient dimension that angle can be magnified.

如果这个棱镜有多个面,可以把角度也放大。

麻省理工公开课 - 固态化学导论课程节选