METHOD TO OBTAIN HIGH QUALITY MOIRE ′ FRINGE SIGNALS
提高叠栅条纹信号质量的一种新方法

In an amplitude grating system of small grid pitch,the diffractive light is the main cause to deteriorate the contrast and sinusoidal property of Moiré signals.The relations between the phase of ± 1st order Moiré fringes and other factors,such as the space of grating pair,are analyzed.It is proposed to use ± 1st order Moiré frings to obtain high quality Moiré signals.Experimental results agree with the theory results well.