Investigation of the influence of departure to circular fringes imaging

This paper discusses the principle of imaging with circular interference fringes and the processing method with matched filter, it also calculated the point spread function. It gives two digital relations by simulation: between the mainside lobe ratio and the phase, and between the departure and the phase. The conclusion is that suitable departure helps to improve the resolution of the imaging, and not to bring any unreasonable side lobe that influences the point spread function.