Novel and simple lateral shear interferometer with holographic lens and spatial Fourier transform

Charles Joenathan; Giancarlo Pedrini; Igor Alekseenko; Wolfgang Osten

doi:10.1117/1.OE.51.7.075601

5 July 2012 Novel and simple lateral shear interferometer with holographic lens and spatial Fourier transform

Charles Joenathan, Giancarlo Pedrini, Igor Alekseenko, Wolfgang Osten

Author Affiliations +

Optical Engineering, Vol. 51, Issue 7, 075601 (July 2012). https://doi.org/10.1117/1.OE.51.7.075601

Abstract

Testing with a single holographic lens or grating in a collimated beam is normally not possible because of the inherent tilt caused in the wavefront. The tilt between the two beams in shearing creates a large number of linear fringes which overshadow the information about the wavefront. However, here, we show that we can use this tilt to make quantitative measurements which was otherwise not possible. In the novel method, we obtain shear in a relatively simple way, and at the same time we extract phase information using spatial Fourier transform technique. This technique is suitable for making quantitative measurement of wavefront and disturbances in turbulent conditions. Here, we demonstrated the real-time phase measurement capacity of the interferometer, a result of one such application is shown.

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Charles Joenathan, Giancarlo Pedrini, Igor Alekseenko, and Wolfgang Osten "Novel and simple lateral shear interferometer with holographic lens and spatial Fourier transform," Optical Engineering 51(7), 075601 (5 July 2012). https://doi.org/10.1117/1.OE.51.7.075601

Published: 5 July 2012

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