Changing the phase of digital grating can realize Moirefringe scanning. The global center of beam pattern can be calculated by multi_frame scanning images.
改变该数字光栅的相位，可实现莫尔条纹扫描，用多幅扫描图像可算出光斑图像整体中心。
2
The virtual grating phase shifting moirefringe is a method to manipulate the static interferogram with carrier fringes.
虚光栅移相莫尔条纹法是一种对静态干涉图的处理方法。
3
The virtual grating phase shifting moirefringe method is studied to measure the parameters of gauge block which combines the techniques on grating, moire, and phase shifting interferometry.