摘要
通常凸透镜的曲面是球面。只有在近轴光线条件下，平行光通过凸透镜才可近似聚焦于一点。本文给出两种能使平行光严格聚焦于一点的凸透镜。
In general, two faces of a convex lens are parts of a sphere. The parallel light rays of the prnicipal axis that approach a convex lens can converge to the focal point. Two kinds of convex lens which make parallel light rays converge to the focal point are given.
出处
《安徽工业大学学报（自然科学版）》
CAS
2001年第2期170-171,174,共3页
Journal of Anhui University of Technology（Natural Science）
关键词
凸透镜
平行光
聚焦
convex lens
parallel light
focal point
