Separation of the influence of in-plane displacement in multiaperture speckle shear interferometry

Nandigana K. Krishna Mohan; Prafulla J. Masalkar; Vadakke Matham Murukeshan; Rajpal S. Sirohi

doi:10.1117/12.167154

1 June 1994 Separation of the influence of in-plane displacement in multiaperture speckle shear interferometry

Nandigana K. Krishna Mohan, Prafulla J. Masalkar, Vadakke Matham Murukeshan, Rajpal S. Sirohi

Author Affiliations +

Optical Engineering, Vol. 33, Issue 6, (June 1994). https://doi.org/10.1117/12.167154

Abstract

An imaging system with its aperture fully open or with a multiaperture mask in front has been used for carrying out speckle shear interferometry. The shearing is achieved by installing shear elements in front of the imaging system. The multiaperture configuration has built-in in-plane displacement sensitivity, and hence shear fringes obtained from multiaperture shear interferometer always carry the in-plane displacement contribution. This problem does not arise when the full aperture of the lens is used. A three-aperture speckle shear interferometric technique is introduced here to separate the in-plane displacement and slope contributions from the shear interferogram. Detailed theoretical and experimental results are presented.

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Nandigana K. Krishna Mohan, Prafulla J. Masalkar, Vadakke Matham Murukeshan, and Rajpal S. Sirohi "Separation of the influence of in-plane displacement in multiaperture speckle shear interferometry," Optical Engineering 33(6), (1 June 1994). https://doi.org/10.1117/12.167154

Published: 1 June 1994

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