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Coded aperture correlation holographic microscope for single-shot quantitative phase imaging with extended field of view

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Document pages: 15 pages

Abstract: Recently, a method of recording holograms of coherently illuminatedthree-dimensional scene without two-wave interference was demonstrated. Themethod is an extension of the coded aperture correlation holography fromincoherent to coherent illumination. Although this method is practical for sometasks, it is not capable of imaging phase objects, a capability that is animportant benefit of coherent holography. The present work addresses thislimitation by using the same type of coded phase masks in a modifiedMach-Zehnder interferometer. We show that by several comparative parameters,the coded aperture-based phase imaging is superior to the equivalent openaperture-based method. As an additional merit of the coded aperture approach, aframework for increasing the system s field of view is formulated anddemonstrated for both amplitude and phase objects. The combination of highsensitivity quantitative phase microscope with increased field of view in asingle camera shot holographic apparatus, has immense potential to serve as thepreferred tool for examination of biological tissues and micro-organisms.

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