5 July 2012 Novel and simple lateral shear interferometer with holographic lens and spatial Fourier transform
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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.
© 2012 Society of Photo-Optical Instrumentation Engineers (SPIE)
Charles Joenathan, Charles Joenathan, Giancarlo Pedrini, Giancarlo Pedrini, Igor Alekseenko, Igor Alekseenko, Wolfgang Osten, 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 . Submission:
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