The optical path difference of two rays in the condition of near axis is discussed in the single spherical surface refraction.
本文讨论了单球形折射面在傍轴条件下二相邻光束的光程差问题。
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Due to those formulas, we designed the single unit extraordinary refraction Rochon prism which was similar to the Rochon prism and unit negative refraction prism, similar to the Wollaston prism.