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Proceedings Paper

Uncollimated light beam illumination during the ocular aberration detection and its impact on the measurement accuracy by using Hartmann-Shack wavefront sensor
Author(s): Jiajie Wu; Jiabi Chen; Ancheng Xu; Xiaoyan Gao
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Paper Abstract

The impact on the measurement accuracy caused by uncollimated illumination beam during the process of human eye aberration measurement by using Hartmann-Shack wavefront sensor has been studied. The principle of Hartmann-Shack wavefront sensor has been introduced. The diopter curve corresponding to the installation errors of lens has been calculated. And the according curve reveals that the diopter of illumination beam at the section of entrance pupil is quite sensitive to the installation errors of lens. The impact on wavefront at the exit pupil under the illumination of uncollimated beam has been analyzed and relative experiments have been done. The experiments show seldom impact of it. Quantitative relationship between the precision of ocular aberration measurement and installation errors of lens is proposed. Experiments to quantitatively simulate the installation errors have been done. The experimental results are in accordance with the theoretical analysis we made and the collimation of illumination beam has an obvious and direct influence on the measurement precision of ocular aberration.

Paper Details

Date Published: 23 November 2009
PDF: 12 pages
Proc. SPIE 7508, 2009 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications, 75080V (23 November 2009); doi: 10.1117/12.837581
Show Author Affiliations
Jiajie Wu, Univ. of Shanghai for Science and Technology (China)
Jiabi Chen, Univ. of Shanghai for Science and Technology (China)
Ancheng Xu, Univ. of Shanghai for Science and Technology (China)
Xiaoyan Gao, Univ. of Shanghai for Science and Technology (China)


Published in SPIE Proceedings Vol. 7508:
2009 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications

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