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Optical Engineering

High resolution near on-axis digital holography using constrained optimization approach with faster convergence
Author(s): Vimal Prabhu Pandiyan; Kedar Khare; Renu John
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Paper Abstract

A constrained optimization approach with faster convergence is proposed to recover the complex object field from a near on-axis digital holography (DH). We subtract the DC from the hologram after recording the object beam and reference beam intensities separately. The DC-subtracted hologram is used to recover the complex object information using a constrained optimization approach with faster convergence. The recovered complex object field is back propagated to the image plane using the Fresnel back-propagation method. The results reported in this approach provide high-resolution images compared with the conventional Fourier filtering approach and is 25% faster than the previously reported constrained optimization approach due to the subtraction of two DC terms in the cost function. We report this approach in DH and digital holographic microscopy using the U.S. Air Force resolution target as the object to retrieve the high-resolution image without DC and twin image interference. We also demonstrate the high potential of this technique in transparent microelectrode patterned on indium tin oxide-coated glass, by reconstructing a high-resolution quantitative phase microscope image. We also demonstrate this technique by imaging yeast cells.

Paper Details

Date Published: 23 September 2017
PDF: 7 pages
Opt. Eng. 56(9) 093103 doi: 10.1117/1.OE.56.9.093103
Published in: Optical Engineering Volume 56, Issue 9
Show Author Affiliations
Vimal Prabhu Pandiyan, Indian Institute of Technology Hyderabad (India)
Univ. of Washington (United States)
Kedar Khare, Indian Institute of Technology Delhi (India)
Renu John, Indian Institute of Technology Hyderabad (India)


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