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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 5 — May. 5, 2009

Long-working-distance synthetic aperture Fresnel off-axis digital holography

Pan Feng, Xiao Wen, and Rong Lu  »View Author Affiliations


Optics Express, Vol. 17, Issue 7, pp. 5473-5480 (2009)
http://dx.doi.org/10.1364/OE.17.005473


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Abstract

An aperture synthesis approach of digital holography for microscopy imaging at long working distance is proposed. Firstly, for an oblique object, a series of Fresnel off-axis holograms are recorded with different tilted plane wave illuminations without using lens for pre-magnification. Then the complex amplitudes are reconstructed and magnified from these holograms by the double-step Fresnel reconstruction method respectively. Finally, the synthesized image of the resolution enhanced and the speckle suppressed is obtained by incoherent superposition of these reconstructed complex amplitudes. The important advantage of the proposed approach is that the working distance of the system isn’t constrained and the reconstructed image doesn’t subject to lens aberrations. The experimental results with a die and an USAF-1951 resolution test target are shown and demonstrated that the resolution of both intensity and phase image can be effectively enhanced with simple set-up and procedure. The proposed approach can improve the capabilities of digital holography in three-dimensional in-situ microscopy at long working distance.

© 2009 Optical Society of America

OCIS Codes
(100.2000) Image processing : Digital image processing
(100.6640) Image processing : Superresolution
(110.0110) Imaging systems : Imaging systems
(110.0180) Imaging systems : Microscopy
(090.1995) Holography : Digital holography

ToC Category:
Holography

History
Original Manuscript: December 2, 2008
Revised Manuscript: February 17, 2009
Manuscript Accepted: March 18, 2009
Published: March 23, 2009

Virtual Issues
Vol. 4, Iss. 5 Virtual Journal for Biomedical Optics

Citation
Pan Feng, Xiao Wen, and Rong Lu, "Long-working-distance synthetic aperture Fresnel off-axis digital holography," Opt. Express 17, 5473-5480 (2009)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-17-7-5473


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