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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 7, Iss. 12 — Dec. 1, 2009
  • pp: 1113–1116

Spatial phase-shifting interferometry with compensation of geometric errors based on genetic algorithm

Joonku Hahn, Hwi Kim, Yongjun Lim, Eun-Hee Kim, and Byoungho Lee  »View Author Affiliations


Chinese Optics Letters, Vol. 7, Issue 12, pp. 1113-1116 (2009)


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Abstract

We propose a novel spatial phase-shifting interferometry that exploits a genetic algorithm to compensate for geometric errors. Spatial phase-shifting interferometry is more suitable for measuring objects with properties that change rapidly in time than the temporal phase-shifting interferometry. However, it is more susceptible to the geometric errors since the positions at which interferograms are collected are different. In this letter, we propose a spatial phase-shifting interferometry with separate paths for object and reference waves. Also, the object wave estimate is parameterized in terms of geometric errors, and the error is compensated by using a genetic algorithm.

© 2009 Chinese Optics Letters

OCIS Codes
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(090.1760) Holography : Computer holography
(230.6120) Optical devices : Spatial light modulators

Citation
Joonku Hahn, Hwi Kim, Yongjun Lim, Eun-Hee Kim, and Byoungho Lee, "Spatial phase-shifting interferometry with compensation of geometric errors based on genetic algorithm," Chin. Opt. Lett. 7, 1113-1116 (2009)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-7-12-1113

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