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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 24 — Nov. 21, 2011
  • pp: 24546–24556

Widefield heterodyne interferometry using a custom CMOS modulated light camera

Rikesh Patel, Samuel Achamfuo-Yeboah, Roger Light, and Matt Clark  »View Author Affiliations

Optics Express, Vol. 19, Issue 24, pp. 24546-24556 (2011)

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In this paper a method of taking widefield heterodyne interferograms using a prototype modulated light camera is described. This custom CMOS modulated light camera (MLC) uses analogue quadrature demodulation at each pixel to output the phase and amplitude of the modulated light as DC voltages. The heterodyne interference fringe patterns are generated using an acousto-optical frequency shifter (AOFS) in an arm of a Mach-Zehnder interferometer. Widefield images of fringe patterns acquired using the prototype MLC are presented. The phase can be measured to an accuracy of ±6.6°. The added value of this method to acquire widefield images are discussed along with the advantages.

© 2011 OSA

OCIS Codes
(100.3175) Image processing : Interferometric imaging
(110.3175) Imaging systems : Interferometric imaging

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: October 4, 2011
Revised Manuscript: November 3, 2011
Manuscript Accepted: November 4, 2011
Published: November 15, 2011

Virtual Issues
Vol. 7, Iss. 1 Virtual Journal for Biomedical Optics

Rikesh Patel, Samuel Achamfuo-Yeboah, Roger Light, and Matt Clark, "Widefield heterodyne interferometry using a custom CMOS modulated light camera," Opt. Express 19, 24546-24556 (2011)

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