Dual-thread parallel control strategy for ophthalmic adaptive optics  

作　　者：于永新 张宇华 

机构地区：[1]School of Computer Science and Technology, Tianjin University [2]Department of Ophthalmology, University of Alabama at Birmingham,Birmingham, AL 35294, USA

出　　处：《Chinese Optics Letters》2014年第12期66-70,共5页中国光学快报（英文版）

基　　金：supported by funding from the EyeSight Foundation of Alabama(YZ),the International Retina Research Foundation(YZ),NIH 5R21EY021903(YZ);institutional support from the Research to Prevent Blindness,the Eye Sight Foundation of Alabama,the Buck Trust of Alabama,and NIH P30 EY003039;supported by a visiting scholarship fund from Tianjin University and the University of Alabama at Birmingham Exchange Scholar Program

摘　　要：To improve ophthalmic adaptive optics （AO） speed and compensate for ocular wavefront aberration of high temporal frequency, the AO wavefront correction is implemented with a control scheme including two parallel threads： one is dedicated to wavefront detection and the other conducts wavefront reconstruction and compensation. With a custom Shack-Hartmann wavefront sensor that measures the ocular wave aber-ration with 193 subapertures across the pupil, AO achieves a closed-loop updating frequency up to 110 Hz, and demonstrates robust compensation for ocular wave aberration up to 50 Hz in an AO scanning laser ophthalmoscope.To improve ophthalmic adaptive optics （AO） speed and compensate for ocular wavefront aberration of high temporal frequency, the AO wavefront correction is implemented with a control scheme including two parallel threads： one is dedicated to wavefront detection and the other conducts wavefront reconstruction and compensation. With a custom Shack-Hartmann wavefront sensor that measures the ocular wave aber-ration with 193 subapertures across the pupil, AO achieves a closed-loop updating frequency up to 110 Hz, and demonstrates robust compensation for ocular wave aberration up to 50 Hz in an AO scanning laser ophthalmoscope.

关 键 词：ABERRATIONS WAVEFRONTS 

分 类 号：R770.4[医药卫生—眼科]