差频相位法光速测量系统误差及精度分析

差频相位法光速测量系统只需较短的距离,就能快速、方便、较高精度地对光速进行测量,非常适合学生实验和演示实验。作为一个自主设计的实验系统,误差控制是一个不可回避的实际问题。从差频相位法测量光速的基本原理和测量过程出发,全面分析了该设计系统存在的各项主要误差,提出了控制误差的方法和措施,并对该系统的精度进行分析计算。为测量系统的设计、调试和测量方法的确定提供了较强的理论和实验指导。

Errors and Precision Analysis of Light Speed Measurement System Based on Slip Frequency Phase Method

The speed of light can be measured quickly,easily and accurately in a short distance by the light speed measurement system based on slip frequency phase method.The system is ideal for students and demonstration experiments.As a self designed experimental system,error control is an unavoidable practical problem.Based on an introduction to light velocity measurement principle and measurement process of the system that uses slip frequency phase method,this paper analyzed all the aspects of the main errors of the self designed system,presented the methods and measures to control errors,and calculated the measurement precision of the system.All of these can provide theoretical and experimental guidance for the designing and debugging of the measurement system,and for the determination of the measuring technique.