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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 28, Iss. 2 — Jan. 15, 1989
  • pp: 345–349

Role of spatial coherence on the rotation sensitivity of Lau fringes: an experimental study

Sundergopal Chitralekha, Kodikullam V. Avudainayagam, and Sastry V. Pappu  »View Author Affiliations


Applied Optics, Vol. 28, Issue 2, pp. 345-349 (1989)
http://dx.doi.org/10.1364/AO.28.000345


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Abstract

A simple technique involving the use of a rotating and a stationary diffuser has been developed to vary the spatial coherence of light from a He–Ne laser. Using this technique an experimental investigation of the dependence of rotation sensitivity of Lau fringes on the spatial coherence of the illuminating wavefield has been carried out. It is observed that (i) the rotation sensitivity of Lau fringes varies in a well-defined manner as a function of the spatial coherence of the light used; (ii) the extremely good rotation sensitivity of Lau fringes can be used to great advantage (compared to the conventional double slit method) in the measurement of the spatial coherence of a wavefield; (iii) Lau fringes are formed at various levels of spatial coherence and as such it appears that the Lau effect need not be associated with an incoherent optical field.

© 1989 Optical Society of America

History
Original Manuscript: January 11, 1988
Published: January 15, 1989

Citation
Sundergopal Chitralekha, Kodikullam V. Avudainayagam, and Sastry V. Pappu, "Role of spatial coherence on the rotation sensitivity of Lau fringes: an experimental study," Appl. Opt. 28, 345-349 (1989)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-28-2-345


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References

  1. E. Lau, “Beugungserscheinungen an Doppelrastern,” Ann. Phys. 6, 417 (1948). [CrossRef]
  2. R. J. Sudol, B. J. Thompson, “Lau Effect: Theory and Experiment,” Appl. Opt. 20, 1107 (1981); F. Gori, “Lau Effect and Coherence Theory,” Opt. Commun. 31, 4 (1979). [CrossRef] [PubMed]
  3. J. Jahns, A. W. Lohmann, “The Lau Effect (A Diffraction Experiment with Incoherent Illumination),” Opt. Commun. 28, 263 (1979). [CrossRef]
  4. G. J. Swanson, E. N. Leith, “Analysis of the Lau Effect and Grating Imaging,” J. Opt. Soc. Am. A 2, 789 (1985). [CrossRef]
  5. J. Jahns, A. W. Lohmann, J. Ojeda-Castaneda, “Talbot and Lau Effects, a Parageometrical Approach,” Opt. Acta 31, 313 (1984). [CrossRef]
  6. K. Patorski, “Incoherent Superposition of Multiple Self Imaging Lau Effect and Moire Fringe Explanation,” Opt. Acta 30, 745 (1983). [CrossRef]
  7. S. Chitralekha, K. V. Avudainayagam, S. V. Pappu, P. S. Ramanujam, “Experimental Verification of the Lateral Periodicity of Axially Periodic Incoherent Fields Using the Lau Effect,” J. Mod. Opt., in press.
  8. J. Ojeda-Castaneda, E. E. Sicre, “Theta Modulation Decoder Based on the Lau Effect,” Opt. Commun. 59, 87 (1986). [CrossRef]
  9. S. Lowenthal, D. Joyeux, “Speckle Removal by a Slowly Moving Diffuser Associated with a Motionless Diffuser,” J. Opt. Soc. Am. 61, 847 (1971). [CrossRef]
  10. B. J. Thompson, E. Wolf, “Two Beam Interference with Partially Coherent Light,” J. Opt. Soc. Am. 47, 895 (1957). [CrossRef]

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