摘要
本文主要分析了平面场透射变换的固定元素，并对其进行了数学分析，最后举例给以说明。
Fixed elements of transmissive trandformation in the pland field and its mathematicae analysis are given with an example in the paper.
关键词
透射变换
固定元素
射影变换
平面场
transmissive transformation,fixed-element,projective transformation
