16 August 2013 Lateral shear interferometer using multiplexed holographic lenses and spatial Fourier transform: varying spectrum position and phase fluctuations
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Optical Engineering, 52(8), 084103 (2013). doi: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.
© 2013 Society of Photo-Optical Instrumentation Engineers (SPIE)
Charles Joenathan, Ashley Bernal, 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
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KEYWORDS
Fourier transforms

Holography

Multiplexing

Interferometers

Holographic interferometry

Lenses

Collimation

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