几何光学中引入符号法则探讨

Probe in the Introduction of Sign Rules into Geometrical Optics

本文以单球面折射为例,经推导,若不引入符号法则,将有八个不同的物象公式;若引入符号法则,可以统一为一 个物象公式。从而给学生以深刻印象——研究几何光学引入符号法则是完全必要的,计算中必须严格遵守符号法则。

With an example of refraction from the sphere of a one -si dcd ball , the article indicates that without Sign Rules , there will exist eight different formulas for Object -Imaging ; With Sign Rules , we will unify the eight formulas into one . So students will be impressed greatly by what is necessary to introduce Sign Rules when we research geometrical optics,and Sign Rules must be obeyed during calculation.