The choice of proper initial Angle of incidence makes a lateral shearing interference easy to realize between the two beams reflected from the front and back surfaces of a plane-parallelplate.
通过选择合适的初始入射角,使从平板前后表面反射的两光束实现剪切干涉。
3
The principle of collimation is analyzed. The influence of the small wedge Angle of the planeparallelplate and the lateral shearing width upon judging laser collimation are discussed.