补偿大气折射率的多波长干涉绝对距离测量  

Absolute Distance Measurement with Multi-wavelength Interferometric Method of Compensating for the Refractive Index of Air

作　　者：华卿[1,2] 周维虎 纪荣祎[1] 

机构地区：[1]中国科学院光电研究院,北京100094 [2]中国科学院大学,北京100049

出　　处：《光电工程》2013年第4期38-44,共7页Opto-Electronic Engineering

基　　金：国家重大科学仪器设备开发专项资助(Y11702A01N)

摘　　要：在绝对距离测量中,由于大气扰动造成的测量路径上折射率分布不均匀对干涉测量有很大的影响,针对这一问题,本文提出了一种补偿大气折射率的多波长干涉测量绝对距离的方法。该方法基于小数重合法的基本原理,在测量过程中不需要对大气参数进行实时监测,而是通过A系数所给出的各波长折射率之间的关系解算距离。文中结合小数重合法的基本原理给出了理论推导与分析,并采用594.1nm、611.9nm、632.8nm三种波长在计算机上进行了数值仿真实验,得到了该算法的小数级次测量精度与非模糊距离(UMR)的匹配关系。In absolute distance measurement, intefferometric methods are severely affected by the uneven distribution of refractive index of air along the optical path with turbulence. To solve this problem, a multi-wavelength interferometric method for absolute distance measurement is presented, which can compensate for the refractive index of air in real time. Instead of monitoring the real-time environmental parameters, this method based on the excess fractions method can obtain the geometric length by using the relationship between the refractive index of different wavelengths provided by the .4 coefficient. A theoretical analysis based on the excess fractions method is presented, and a numerical simulation with 594.1 nm, 611.9 nm and 632.8 nm wavelengths is conducted on computer. The result shows the relationship between the Unambiguous Measurement Range （UMR） and the required fringe fraction resolution under this wavelength combination.

关 键 词：多波长干涉测量 绝对距离测量 小数重合法 大气折射率补偿 

分 类 号：TB921[一般工业技术—计量学] TN247[机械工程—测试计量技术及仪器]