Recent Progress on Aberration Compensation and Coherent Noise Suppression in Digital Holography

Abstract

Digital holographic microscopy (DHM) is a topographic measurement technique that permits full-field, nondestructive, dynamic, quantitative amplitude, and phase-contrast imaging. The technique may realize the lateral resolution with submicron scale and the longitudinal resolution with subnanometer scale, respectively. Improving imaging quality has always been the research focus in DHM since it has a direct effect on the precise topographic measurement. In this paper, the recent progress on phase aberration compensation and coherent noise suppression is reviewed. Included in this review are the hologram spectrum's centering judgment methods of side band in tilt phase error compensation, the physical and numerical compensation methods in phase aberration compensation, and the single-shot digital process methods in coherent noise suppression. The summaries and analyses for these approaches can contribute to improving the imaging quality and reducing the measurement error of DHM, which will further promote the wider applications of DHM in the topographic measurement fields, such as biology and micro-electro mechanical systems.

Multiwavelength Digital Holographic Imaging and Phase Unwrapping of Protozoa Using Custom Fiji Plug-ins

“…The quality metrics can be extended programmatically by implementing the Quality interface. The double wavelength unwrapping method uses the subtraction method described in several places in the literature [12,16,28].…”

“…The presence of the lens causes a magnification of the object according to the rules of geometric optics, with a resulting quadratic phase aberration. Removal of this aberration, and others such as astigmatism, may be done by a variety of methods; the literature is extensive, with recent reviews [11,12]. One of the most easily performed, if the data permit, is to define a "reference hologram" that is subtracted from the rest of the holograms in the data set prior to reconstruction.…”

Speckle Reduction in Digital Holographic Microscopy by Physical Manipulation of the Pupil Function

“…Due to the uncountable amount of work that has been devoted to speckle and the everincreasing number of research publications related to these methods, multiple review works have been published with the most successful approaches for a given technique. In Digital Holography, recent and complete compilations of speckle denoising methods are available in [106,107], one of them having been published in the first months of 2020; additionally, a comprehensive study of the suppression of other inaccuracy sources can be found in [108],…”

Digital Holographic Microscopy with extended field of view using tool for generic image stitching

“…Here, we describe some of the methods that we have chosen to compare with our approach, that is, AME method. For more comprehensive overview of phase aberration compensation methods we recommend an up‐to‐date paper . Our constraints are the following: procedure needed to be applicable automatically, without the need for selecting specimen‐free region and it should be applicable without readjustment of the hardware.…”