Numerical calculation of focusing properties of quasi-random-dot-array binary Gabor zone plate

Fresnel zone plate has a dominating focus and a series of high-order foci, it will be influenced by advanced diffraction when used as an imaging device. A Gabor zone plate has only one focus, it has much better diffraction properties. However, it is hard to fabricate. The emergence of quasi-random-dot-array binary Gabor zone plates can solve this problem. In this paper, design of quasi-random-dot-array binary Gabor zone plates is introduced, and diffraction properties of Fresnel zone plate and binary Gabor zone plate are simulated by optimized program. Analyzing and comparing the simulation show that the quasi-random-dot-array binary Gabor zone plate could restrain advanced diffraction．