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Optical Engineering

Lateral shear interferometer using multiplexed holographic lenses and spatial Fourier transform: varying spectrum position and phase fluctuations
Author(s): Charles Joenathan; Ashley Bernal; Rajpal S. Sirohi
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Paper Abstract

Previously, we reported a simple method to obtain lateral shear in both the x - and y -directions using a multiplexing technique. The phase data was extracted using the inherent spatial carrier fringes formed due to the tilt in the two sheared beams. In this article, we report that an error in phase map is introduced when the band-pass-filtered Fourier transform (FT) spectrum is not centered prior to performing the inverse FT to obtain the phase. We also found that intentionally introducing aberrations when capturing dynamic fluctuations in the wave front, resulted in controlling the spread of the Fourier spectrum.

Paper Details

Date Published: 16 August 2013
PDF: 8 pages
Opt. Eng. 52(8) 084103 doi: 10.1117/1.OE.52.8.084103
Published in: Optical Engineering Volume 52, Issue 8
Show Author Affiliations
Charles Joenathan, Rose-Hulman Institute of Technology (United States)
Ashley Bernal, Rose-Hulman Institute of Technology (United States)
Rajpal S. Sirohi, Rose-Hulman Institute of Technology (United States)

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