Algorithm for extending dynamic range of Shack-Hartmann wavefront sensor

被引：0
|
作者：
Zhang J. [1 ,2 ]
Zhang Z. [1 ]
Zhang X. [1 ]
Li R. [1 ]
机构：
[1] Key Laboratory of Optical System Advanced Manufacturing Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun
[2] Graduate University of Chinese Academy of Sciences
来源：
Guangxue Xuebao/Acta Optica Sinica | 2011年 / 31卷 / 08期
关键词：
Dynamic range; Optical test; Shack-Hartmann wavefront sensor; Spots regression;
D O I：
10.3788/AOS201131.0812006
中图分类号：
学科分类号：
摘要：
A new algorithm called spots regression is presented to solve the tradeoff between the dynamic range and sensitivity of Shack-Hartmann wavefront sensor. This new algorithm allows spots to wander, so the dynamic range can be extended while the sensitivity is also sensitive. In order to find out the relation between the spots array and microlenses array even if spots leave their original sub-aperture, firstly, getting the irregular spots to their primary positions, secondly, finding out the match relation between one spot and one microlens. Finally, all spots and all microlenses match each other. The advantage of this algorithm is that there are no requirements for extra hardware, multiple measurements or complicated algorithms. A simple experiment is carried out to demonstrate its implementation. The results of this experiment are very closed to the theoretical ones. And the dynamic range is 25 times larger than that of conventional algorithm.
引用
收藏
相关论文
共 16 条
  • [1] Hou J., Jiang W., Ling N., The misalignment error of Hartmann-Shack wavefront sensors and deformable mirror in the two kinds of adaptive optics systems, Acta Optica Sinica, 23, 6, pp. 751-755, (2003)
  • [2] Xian H., Li H., Jiang W., Et al., Measurement of the wavefront phase of a laser beam with Hartmann-Shack sensor, Opto-Electronic Engineering, 22, 2, pp. 38-45, (1995)
  • [3] Daniel M.H., Duran-Ramirez M.V., Measuring aspheric wavefronts with high accuracy using Hartmann test, SPIE, 5776, pp. 524-529, (2005)
  • [4] Rao X., Ling N., Wang C., Et al., Application of Hartmann-Shack sensor in aspheric process, Acta Optica Sinica, 22, 4, pp. 491-494, (2002)
  • [5] Tang G., He Y., Liao Z., Radial Hartmann method for measuring large optical system, Chinese J. Lasers, 37, 3, pp. 795-799, (2010)
  • [6] Zheng H., Rao C., Rao X., Et al., Wavefront stitching detection method based on Hartmann-Shack wavefront sensor, Acta Optica Sinica, 29, 12, pp. 3385-3390, (2009)
  • [7] Bao H., Rao C., Zhang Y., Et al., An automatic defocus compensation method for human eye hartmann-Shark wavefront aberrometer, Acta Optica Sinica, 30, 11, pp. 3082-3089, (2010)
  • [8] Li C., Jiang B., Xia M., Et al., Laser speckle reduction in retina imaging illumination, Acta Optica Sinica, 28, 12, pp. 2245-2249, (2008)
  • [9] Quan W., Ling N., Wang Z., Et al., Property study for Hartmann sensor used in measuring wave aberration of human eye, Opto-Electronic Engineering, 30, 3, pp. 1-5, (2003)
  • [10] Pfund J., Lindlein N., Schwider J., Dynamic range expansion of a Shack-Hartmann sensor by use of a modified unwrapping algorithm, Opt. Lett., 23, 13, pp. 995-997, (1998)
12