摘要
针对在曾经提出的基于自混合干涉的微角度测量系统中,由于只通过旋转直角棱镜获得待测角度,会导致测量分辨率受限.根据平板玻璃在转动过程中会导致测角系统整体的光程发生变化,从而增大原测角系统的光程差,导致测角分辨率提高的原理,提出了一种改进的微角度测量系统.在保证激光器发出的激光经过外界平面镜反射后可以沿原路反馈回激光腔中的前提下,在直角棱镜前增加了一个平板玻璃,通过同时旋转直角棱镜和平板玻璃进行角度测量;讨论了直角棱镜的边长,平板玻璃的厚度以及这两个光学元件的折射率对于测角分辨率的影响,得出了在合适的测量范围内,针对该测角系统,选择较大边长的直角棱镜,较厚的平板玻璃,可以进一步提高微角度测量系统的分辨率,从而达到优化测角系统的目的.
Since the previously used small-angle measurement system, which is based on self-mixing interference, is blamed for its limitation in measurement resolution, for the angle to be measured can only be obtained by rotating the right-angle prism, an improved small-angle-measuring system is proposed based on the principle according to which the rotating flat glass will result in changes of the optical path of the overall angle-measuring system so that the optical path difference of the original angle-measuring system enlarges and thus the angle-measuring resolution will increase accordingly. On the premise of ensuring that the laser produced by the generator, after reflected by the outside optical flat, can retrieve back to the laser cavity, a flat glass is added before the right angle prism, by rotatiing both the right angle prism and the flat glass simultaneously, the angle is measured. Also discussed are the side length of the right-angle prism, the thickness of optical flat and the effect of the refractive rate of the two optical components on the measurement resolution. it is concluded that within the appropriate ranges of measurement, a higher resolution will be acquired when the right-angle prism with a larger side length, and a thicker optical flat are selected so as to achieve the purpose of optimizing the small-angle measurement system.
作者
杨波
章骏
倪江利
YANG Bo;ZHANG Jun;NI Jiangli(Basic Experimental Teaching Center,Anhui Sanlian University,Hefei,Anhui 230601,China)
出处
《内江师范学院学报》
2019年第6期51-55,共5页
Journal of Neijiang Normal University
基金
安徽省高校自然科学研究重点项目(KJZD2018010)
安徽省教育厅自然科学研究重点项目(KJ2016A891)
安徽三联学院教学团队项目(16zlgc018)
关键词
自混合
微角度
直角棱镜
平板玻璃
分辨率
self-mixing interference
small angle
right-angle prism
optical flat
resolution
