Apodization of two-dimensional pupils with aberrations

Pramana: Journal of physics

MAHDIEH HASHEMI^4²  ANDRA NARESH KUMAR REDDY^1,2,3³  SVETLANA NIKOLAEVNA KHONINA^1,2⁴ 

[1] Department of Physics, College of Science, Fasa University, Fasa 74617-81189, Iran^4;Image Processing Systems Institute – Branch of the Federal Scientific Research Centre, “Crystallography and Photonics” of Russian Academy of Sciences, 151 Molodogvardeyskaya St., Samara 443001, Russia^2;Samara National Research University, Moskovskoye Shosse, 34, Samara 443086, Russia^1;School of Engineering, Anurag Group of Institutions, Venkatapur, Ghatekesar, Medchal District, Hyderabad 500 088, India^3

关键词: Aberrations;    diffraction;    point spread function;    apodization;    resolution;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

The technique proposed to enhance the resolution of the point spread function (PSF) of an optical system underneath defocussing and spherical aberrations. The method of approach is based on the amplitude and phase masking in a ring aperture for modifying the light intensity distribution in the Gaussian focal plane ($Y_{D} = 0$) and in the defocussed planes ($Y_{D} = \pi$ and $Y_{D} = 2\pi$). The width of the annulus modifies the distribution of the light intensity in the side lobes of the resultant PSF. In the presence of an asymmetry in the phase of the annulus, the Hanning amplitude apodizer [cos($\pi\beta\rho$)] employed in the pupil function can modify the spatial distribution of light in the maximum defocussed plane ($Y_{D} = 2\pi$), results in PSF with improved resolution.

【 授权许可】

CC BY