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Journal of the Optical Society of Korea

Journal of the Optical Society of Korea

| PUBLISHED BY THE OPTICAL SOCIETY OF KOREA

  • Vol. 17, Iss. 6 — Dec. 1, 2013
  • pp: 525–532

Modeling Alignment Experiment Errors for Improved Computer-Aided Alignment

Yunjong Kim, Ho-Soon Yang, Jae-Bong Song, Sug-Whan Kim, and Yun-Woo Lee  »View Author Affiliations


Journal of the Optical Society of Korea, Vol. 17, Issue 6, pp. 525-532 (2013)


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Abstract

Contrary to the academic interests of other existing studies elsewhere, this study deals with how the alignment algorithms such as sensitivity or Differential Wavefront Sampling (DWS) can be better used under effects from field, compensator positioning and environmental errors unavoidable from the shop-floor alignment work. First, the influences of aforementioned errors to the alignment state estimation was investigated with the algorithms. The environmental error was then found to be the dominant factor influencing the alignment state prediction accuracy. Having understood such relationship between the distorted system wavefront caused by the error sources and the alignment state prediction, we used it for simulated and experimental alignment runs for Infrared Optical System (IROS). The difference between trial alignment runs and experiment was quite close, independent of alignment methods; 6 nm rms for sensitivity method and 13 nm rms for DWS. This demonstrates the practical usefulness and importance of the prior error analysis using the alignment algorithms before the actual alignment runs begin. The error analysis methodology, its application to the actual alignment of IROS and their results are described together with their implications.

© 2013 Optical Society of Korea

OCIS Codes
(220.1140) Optical design and fabrication : Alignment
(220.4840) Optical design and fabrication : Testing

History
Original Manuscript: November 6, 2013
Manuscript Accepted: November 18, 2013
Published: December 25, 2013

Citation
Yunjong Kim, Ho-Soon Yang, Jae-Bong Song, Sug-Whan Kim, and Yun-Woo Lee, "Modeling Alignment Experiment Errors for Improved Computer-Aided Alignment," J. Opt. Soc. Korea 17, 525-532 (2013)
http://www.opticsinfobase.org/josk/abstract.cfm?URI=josk-17-6-525


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