Analysis of eccentric photorefraction by Fourier optics  

作　　者：刘勇 陈家璧 

机构地区：[1]College of Opto-Electro-Information Engineering University of Shanghai for Science and Technology

出　　处：《Chinese Optics Letters》2007年第3期146-148,共3页中国光学快报（英文版）

基　　金：This work was supported by the National Basic Research Program of China (No. 2005CB724304); the Optical Science and Technology Program of Science and Technology Committee of Shanghai (No. 046105014);the Youth Program of Zhaoqing University (No. 0303).

摘　　要：Eccentric photorefraction usually is used as early eyesight diagnostic test of infants and small children. Unlike currently approved geometrical optical model of eccentric photorefractometer, the crescent formation and the light-intensity distribution in the pupil image of a myopic eye are analyzed by Fourier optics with the assumption of an isotropic scattering retina. In the case of little circular light source and rectangular slit, the simulation results of different myopic diopters are obtained by geometrical optical theory and Fourier optics respectively. It is found that the simulation results by Fourier optics are similar as those obtained by geometrical optics, and all simulations are almost corresponding to the experimental result. The result demonstrates that the new method presented here is feasible.Eccentric photorefraction usually is used as early eyesight diagnostic test of infants and small children. Unlike currently approved geometrical optical model of eccentric photorefractometer, the crescent formation and the light-intensity distribution in the pupil image of a myopic eye are analyzed by Fourier optics with the assumption of an isotropic scattering retina. In the case of little circular light source and rectangular slit, the simulation results of different myopic diopters are obtained by geometrical optical theory and Fourier optics respectively. It is found that the simulation results by Fourier optics are similar as those obtained by geometrical optics, and all simulations are almost corresponding to the experimental result. The result demonstrates that the new method presented here is feasible.

关 键 词：DIAGNOSIS Fourier optics Geometrical optics Optical variables measurement 

分 类 号：O438.2[机械工程—光学工程]