摘要
以氦氖激光作为光源,将单束窄光束平行光经扩束系统扩展为宽光束平行光后,垂直照射待测薄透镜,利用特殊光线性质及几何关系分别测定了薄透镜(凸透镜和凹透镜)的焦距。此方法实验原理简单,容易理解,操作方便,容易掌握,且测量准确,是一种比较实用的测量方法。这将进一步拓展测量薄透镜焦距的方法,为大学生综合性、设计性实验项目提供更为开阔的思路和方法。
With he-he laser as light source, a beam of narrow parallel light is expanded wide parallel light beam by beam expanding, then irradiates thin lens vertically, with special light properties and ge- ometric relations, respectively measured the focal length of thin lens （ convex and concave lens） . The method features simple experiment principle, easy to understand, convenient operation, easy to master and high accuracy. It is a kind of practical measuring method. It can expand the measuring method of the focal length of thin lens, and provides a more open ideas and methods for comprehensive and desig- ning experiments project of college students.
出处
《实验室科学》
2017年第2期6-7,11,共3页
Laboratory Science
关键词
扩束平行激光
薄透镜
焦距
beam expanding parallel laser
thin lens
focal length
