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Automated collimation testing by incorporating the Fourier transform method in Talbot interferometry |
Applied Optics, Vol. 50, Issue 10, pp. 1446-1452 (2011)
http://dx.doi.org/10.1364/AO.50.001446
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Abstract
In this paper, we report an automated technique for collimation testing by incorporating Fourier fringe analysis of the recorded interferograms in Talbot interferometry. The triangular profile of Talbot interferometric fringes has been recorded using a CCD and computer system. The interferograms corresponding to the in-focus, at-focus, and out-of-focus positions of the collimating lens have been recorded. Direct phase measurement using the Fourier transform method has been used for detection of collimation positions. Good accuracy and precision in measurement have been achieved.
© 2011 Optical Society of America
OCIS Codes
(070.6760) Fourier optics and signal processing : Talbot and self-imaging effects
(100.2650) Image processing : Fringe analysis
(120.1680) Instrumentation, measurement, and metrology : Collimation
(070.2465) Fourier optics and signal processing : Finite analogs of Fourier transforms
ToC Category:
Fourier Optics and Signal Processing
History
Original Manuscript: October 26, 2010
Revised Manuscript: December 30, 2010
Manuscript Accepted: February 15, 2011
Published: March 30, 2011
Citation
Jitendra Dhanotia and Shashi Prakash, "Automated collimation testing by incorporating the Fourier transform method in Talbot interferometry," Appl. Opt. 50, 1446-1452 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-10-1446
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