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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 15 — May. 20, 2011
  • pp: 2140–2144

Real-time detection and elimination of nonorthogonality error in interference fringe processing

Haijiang Hu and Fengdeng Zhang  »View Author Affiliations


Applied Optics, Vol. 50, Issue 15, pp. 2140-2144 (2011)
http://dx.doi.org/10.1364/AO.50.002140


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Abstract

In the measurement system of interference fringe, the nonorthogonality error is a main error source that influences the precision and accuracy of the measurement system. The detection and elimination of the error has been an important target. A novel method that only uses the cross-zero detection and the counting is proposed to detect and eliminate the nonorthogonality error in real time. This method can be simply realized by means of the digital logic device, because it does not invoke trigonometric functions and inverse trigonometric functions. And it can be widely used in the bidirectional subdivision systems of a Moiré fringe and other optical instruments.

© 2011 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.4120) Instrumentation, measurement, and metrology : Moire' techniques

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: October 20, 2010
Revised Manuscript: March 23, 2011
Manuscript Accepted: March 25, 2011
Published: May 11, 2011

Citation
Haijiang Hu and Fengdeng Zhang, "Real-time detection and elimination of nonorthogonality error in interference fringe processing," Appl. Opt. 50, 2140-2144 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-15-2140


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References

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