Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Refocus criterion based on maximization of the coherence factor in digital three-wavelength holographic interferometry

Not Accessible

Your library or personal account may give you access

Abstract

This Letter presents an alternative approach for image refocusing in digital Fresnel holography. In the literature, a large majority of reported focus detection criteria is based on amplitude contrast or phase contrast. We propose a focus detection criterion based on the speckle phase coherence factor. This factor reaches its maximum value at the best focus distance. At any reconstruction distance, estimation of the coherence factor is based on robust noise estimation from anisotropic diffusion. We propose a theoretical relation to estimate the coherence factor from the measured standard deviation. Experimental results for the case of three-color holographic imaging and interferometry are provided. Experimental results show the suitability of the proposed approach for image plane refocusing.

© 2017 Optical Society of America

Full Article  |  PDF Article
More Like This
Refocus criterion from image-plane speckle correlation in digital holographic interferometry

Mikael Sjödahl and Pascal Picart
Appl. Opt. 63(7) B104-B113 (2024)

Reduction of speckle noise in holographic images using spatial jittering in numerical reconstructions

Mohamed Haouat, Jorge Garcia-Sucerquia, Abdelhamid Kellou, and Pascal Picart
Opt. Lett. 42(6) 1047-1050 (2017)

Refocus criterion for both phase and amplitude objects in digital holographic microscopy

Frank Dubois, Ahmed El Mallahi, Jérôme Dohet-Eraly, and Catherine Yourassowsky
Opt. Lett. 39(15) 4286-4289 (2014)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (3)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved