Method for detecting coherence of multiple optical axes

摘要

The measurement of the angle between multiple optical axes is achieved by using a parallel light pipe with a Cassegrain structure. And proposed a method for the use of theodolite auxiliary measurement for this system. The system uses the value of deviation x and y of the crosshair on the two-dimensional plane to represent the vertical angle β 'and the horizontal angle «'. We have found the relationship between this variables by establishing a mathematical model and proved the correctness of this relationship is verified through experimental data by building an experiments while verifying the feasibility of the multi-axis consistency measurement method. The experimental data show that the total error of the optical axis is less than 12 ", which accords with the system index, and shows that the measurement method is real and effective.