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Applied Optics

Applied Optics


  • Vol. 23, Iss. 10 — May. 15, 1984
  • pp: 1542–1546

Simultaneous measurement of slope and curvature with a three-aperture speckle shearing interferometer

D. K. Sharma, R. S. Sirohi, and M. P. Kothiyal  »View Author Affiliations

Applied Optics, Vol. 23, Issue 10, pp. 1542-1546 (1984)

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A simple three-aperture speckle shearing arrangement is proposed for simultaneous measurement of slope and curvature of the specimen. The double exposed shearogram of the laser-illuminated specimen yields five distinct diffraction halos when subjected to Fourier filtering. The first-order halos on either side of the central halo give slope fringes of the specimen, together with relatively broad low-visibility curvature fringes. The second-order halos provide pure slope fringes with a sensitivity double that of the slope fringes obtained from the first-order halo.

© 1984 Optical Society of America

Original Manuscript: October 3, 1983
Published: May 15, 1984

D. K. Sharma, R. S. Sirohi, and M. P. Kothiyal, "Simultaneous measurement of slope and curvature with a three-aperture speckle shearing interferometer," Appl. Opt. 23, 1542-1546 (1984)

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