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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 35 — Dec. 10, 2008
  • pp: 6666–6674

Integrated diffractive shearing interferometry for adaptive wavefront sensing

Jason H. Karp, Trevor K. Chan, and Joseph E. Ford  »View Author Affiliations

Applied Optics, Vol. 47, Issue 35, pp. 6666-6674 (2008)

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We present theory, design, and preliminary experimental studies for a compact wavefront sensor based on lateral shearing interferometry using a binary phase grating, image sensor, and Fourier-based processing. The integrated system places a diffractive element directly onto an image sensor to generate interference fringes within overlapping diffraction orders. The shearing ratio and the interferogram signal-to-noise ratio directly affect the reconstruction accuracy of wavefronts with differing spatial variations. Optimal shearing parameters associated with the autocorrelation of the input encourage placing a spatial light modulator as the diffractive element allowing adaptive wavefront sensing. Experimental results from a fixed-grating system are presented as well as requirements for next-generation adaptive systems.

© 2008 Optical Society of America

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(110.3175) Imaging systems : Interferometric imaging
(070.6120) Fourier optics and signal processing : Spatial light modulators

ToC Category:
Integrated Optics

Original Manuscript: July 3, 2008
Revised Manuscript: October 1, 2008
Manuscript Accepted: November 4, 2008
Published: December 8, 2008

Jason H. Karp, Trevor K. Chan, and Joseph E. Ford, "Integrated diffractive shearing interferometry for adaptive wavefront sensing," Appl. Opt. 47, 6666-6674 (2008)

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