Abstract
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
Full Article | PDF ArticleMore Like This
R. K. Mohanty, C. Joenathan, and Rajpal S. Sirohi
Appl. Opt. 24(18) 3106-3109 (1985)
Kaifu F. Wang, A. Kiet Tieu, and Enbang B. Li
Appl. Opt. 39(16) 2577-2583 (2000)
R. K. Mohanty, C. Joenathan, and R. S. Sirohi
Appl. Opt. 23(24) 4596-4600 (1984)