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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 45, Iss. 5 — Feb. 10, 2006
  • pp: 822–828

Superresolved imaging in digital holography by superposition of tilted wavefronts

Vicente Mico, Zeev Zalevsky, Pascuala García-Martínez, and Javier García  »View Author Affiliations


Applied Optics, Vol. 45, Issue 5, pp. 822-828 (2006)
http://dx.doi.org/10.1364/AO.45.000822


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Abstract

A technique based on superresolution by digital holographic microscopic imaging is presented. We used a two dimensional (2-D) vertical-cavity self-emitting laser (VCSEL) array as spherical-wave illumination sources. The method is defined in terms of an incoherent superposition of tilted wavefronts. The tilted spherical wave originating from the 2-D VCSEL elements illuminates the target in transmission mode to obtain a hologram in a Mach–Zehnder interferometer configuration. Superresolved images of the input object above the common lens diffraction limit are generated by sequential recording of the individual holograms and numerical reconstruction of the image with the extended spatial frequency range. We have experimentally tested the approach for a microscope objective with an exact 2-D reconstruction image of the input object. The proposed approach has implementation advantages for applications in biological imaging or the microelectronic industry in which structured targets are being inspected.

© 2006 Optical Society of America

OCIS Codes
(090.0090) Holography : Holography
(100.6640) Image processing : Superresolution
(110.0180) Imaging systems : Microscopy

ToC Category:
Digital/Electronic Holographic Microscopy

History
Original Manuscript: May 18, 2005
Revised Manuscript: August 23, 2005
Manuscript Accepted: August 24, 2005

Virtual Issues
Vol. 1, Iss. 3 Virtual Journal for Biomedical Optics

Citation
Vicente Mico, Zeev Zalevsky, Pascuala García-Martínez, and Javier García, "Superresolved imaging in digital holography by superposition of tilted wavefronts," Appl. Opt. 45, 822-828 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-5-822

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