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Optical Engineering

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

Paper Details

Date Published: 1 June 1994
PDF: 10 pages
Opt. Eng. 33(6) doi: 10.1117/12.167154
Published in: Optical Engineering Volume 33, Issue 6
Show Author Affiliations
Nandigana K. Krishna Mohan, Indian Institute of Technology/Madras (India)
Prafulla J. Masalkar, Indian Institute of Technology/Madras (India)
Vadakke Matham Murukeshan, Indian Institute of Technology (India)
Rajpal S. Sirohi, Indian Institute of Technology (India)


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