Extended focused image in microscopy by digital holography
Year: 2005
Authors: Ferraro P., Grilli S., Alfieri D., De Nicola S., Finizio A., Pierattini G., Javidi B., Coppola G., Striano V.
Autors Affiliation: Istituto Nazionale di Ottica Applicata, Sez. di Napoli, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy;
Istituto di Cibernetica del CNR, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy;
University of Connecticut, Electrical and Computer Engineering Dept., 371 Fairfield Road, Unit 2157, Storrs, CT 06269-2157, USA;
Istituto di Microelettronica e Microsistemi del CNR, Via P. Castellini 111, 80100, Napoli, Italy
Abstract: In microscopy, high magnifications are achievable for investigating micro-objects but the paradigm is that higher is the required magnification, lower is the depth of focus. For an object having a three-dimensional (3D) complex shape only a portion of it appears in good focus to the observer who is essentially looking at a single image plane. Actually, two approaches exist to obtain an extended focused image, both having severe limitations since the first requires mechanical scanning while the other one requires specially designed optics. We demonstrate that an extended focused image of an object can be obtained through digital holography without any mechanical scanning or special optical components. The conceptual novelty of the proposed approach lies in the fact that it is possible to completely exploit the unique feature of DH in extracting all the information content stored in hologram, amplitude and phase, to extend the depth of focus. (c) 2005 Optical Society of America.
Journal/Review: OPTICS EXPRESS
Volume: 13 (18) Pages from: 6738 to: 6749
KeyWords: Reconstruction; Depth; FieldDOI: 10.1364/OPEX.13.006738ImpactFactor: 3.764Citations: 222data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-24References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here
