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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 45, Iss. 27 — Sep. 20, 2006
  • pp: 6940–6946

Accurate pixel-to-pixel correspondence adjustment in a digital micromirror device camera by using the phase-shifting moiré method

Shien Ri, Motoharu Fujigaki, Toru Matui, and Yoshiharu Morimoto  »View Author Affiliations

Applied Optics, Vol. 45, Issue 27, pp. 6940-6946 (2006)

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A camera based on the digital micromirror device (DMD) technology has been previously developed. In this optical system, the correspondence of each mirror of the DMD to each pixel of the CCD cannot readily be done since the pixel sizes of the DMD and the CCD are very small. An accurate pixel-to-pixel correspondence adjustment in the DMD camera by means of the phase-shifting moiré method is proposed. To perform high accurate adjustment of the optical system, the phase distribution of a moiré fringe pattern is analyzed when the CCD pixels and the DMD mirrors have a mismatch and∕or misalignment with each other. This technique does not need a complicated setting or complex image processing to generate the moiré fringe pattern, and it needs only one captured image. In the adjustment experiment, the proposed method provided very accurate adjustment whose error was less than 1 / 25 pixel . An experiment of phase analysis to demonstrate the usefulness was performed.

© 2006 Optical Society of America

OCIS Codes
(100.2650) Image processing : Fringe analysis
(110.2970) Imaging systems : Image detection systems
(120.4120) Instrumentation, measurement, and metrology : Moire' techniques
(220.1140) Optical design and fabrication : Alignment
(230.3990) Optical devices : Micro-optical devices

Original Manuscript: February 9, 2006
Revised Manuscript: April 21, 2006
Manuscript Accepted: April 28, 2006

Shien Ri, Motoharu Fujigaki, Toru Matui, and Yoshiharu Morimoto, "Accurate pixel-to-pixel correspondence adjustment in a digital micromirror device camera by using the phase-shifting moiré method," Appl. Opt. 45, 6940-6946 (2006)

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