Abstract

Current methods in shear interferometry provide shear only along one direction at a time. We propose a method in which interferograms with shear along the $x$, $y$, and $xy$ directions can be obtained simultaneously from a single exposure recording via the concept of spatial multiplexing. The method utilizes holographic lenses, which have been recorded on a single plate with their optical centers translated along the $x$ and $y$ directions. The phase information is extracted through the Fourier transform method. In addition, this technique also provides a method to obtain interferograms with shear in multiples of the original shear along the $x$ and $y$ axis in one single frame capture due to the nonlinearity inherent in the phase holographic lens.

© 2013 Optical Society of America

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