摘要
几何光学方法是一类重要的测量方法，与光电技术相结合，它具有精度高、响应快、可实现现场实时控制和非接触等优点。但它一直受到照明和成像系统的双重散焦问题的困扰，它不仅使系统测量精度和范围受到限制，甚至在大范围时可能使系统完全失效。本文提出一种利用旋转棱镜对光束进行变换方法，它能使平行光（或高斯光）在一较大的空间范围内保持优越的聚焦性能（或近似当光线处理），可使系统在保证高精度的同时提高测量范围。
Conventional geometric optics method is a kind of important measurement methods.Combined with optoelectronical techniques,it has advantages of high precision,quick response,easiness to real time control and noncontact.But its function is liable to be ruined by the defocusensess of both the illuminating and imaging systems,which limit the measurement accurracy of the system and even make the system disable when sometimes the range extends.It is presented in this paper a method to transform the beam by an axicon.It makes parallel beam(or Gause beam)have very good properties of field and energe arrangement in a relatively large depth which improves the system's measurement range without loss of precision.Two simple examples are given to demonstrate its application.
出处
《光学精密工程》
EI
CAS
CSCD
1997年第4期112-118,共7页
Optics and Precision Engineering
关键词
几何光学
旋转棱镜
无衍射特性
光束变换
测量
Goemetric optics,Axicon,Nondiffraction,Defocusness,Beam transformation
