The prism turning theorem as first put forward in China describes the directional conjugate relation between the object and the image space, being applicable to afocal systems.
棱镜转动定理是我国首先提出的，实际上此定理描述的是物、象空间方向共轭关系，适用于无光焦度光学系统。
The image formula for a prism is given for a narrow bundle of rays from an object point to an image point, and the image pictures are drawn by computer for some given conditions.
本文推导了在窄光束条件下物点的子午像的位置公式，并用计算机打出几种特定情况下像的图形。
The image formula for a prism is given for a narrow bundle of rays from an object point to an image point, and the image pictures are drawn by computer for some given conditions.
本文推导了在窄光束条件下物点的子午像的位置公式，并用计算机打出几种特定情况下像的图形。
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