Lateral shear interferometer using multiplexed holographic lenses and spatial Fourier transform: varying spectrum position and phase fluctuations

Charles Joenathan; Ashley Bernal; Rajpal S. Sirohi

doi:10.1117/1.OE.52.8.084103

16 August 2013 Lateral shear interferometer using multiplexed holographic lenses and spatial Fourier transform: varying spectrum position and phase fluctuations

Charles Joenathan, Ashley Bernal, Rajpal S. Sirohi

Author Affiliations +

Optical Engineering, Vol. 52, Issue 8, 084103 (August 2013). https://doi.org/10.1117/1.OE.52.8.084103

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.

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Charles Joenathan, Ashley Bernal, and Rajpal S. Sirohi "Lateral shear interferometer using multiplexed holographic lenses and spatial Fourier transform: varying spectrum position and phase fluctuations," Optical Engineering 52(8), 084103 (16 August 2013). https://doi.org/10.1117/1.OE.52.8.084103

Published: 16 August 2013

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