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Superresolved common-path phase-shifting digital inline holographic microscopy using a spatial light modulator |
Optics Letters, Vol. 37, Issue 23, pp. 4988-4990 (2012)
http://dx.doi.org/10.1364/OL.37.004988
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Abstract
Common-path phase-shifting lensless holographic microscopy has been recently proposed as a novel approach capable of high numerical aperture imaging in a lensless digital inline holographic microscopy layout [Opt. Lett. 35, 3919 (2010)]. Here we present proof-of-concept validation for improving the resolution limit imposed by diffraction in such a setup. This is accomplished by shifting the phase lens displayed at the spatial light modulator, which moves the illumination point source to different off-axis positions. For each off-axis position, a set of inline phase-shifted holograms are recorded by the digital sensor and stored at the computer’s memory for later digital postprocessing. As a consequence, each recording allows the recovery of different spatial frequency content of the object’s diffracted wavefront meaning a superresolved image of the input object. Experimental results are reported validating the proposed method.
© 2012 Optical Society of America
OCIS Codes
(050.5080) Diffraction and gratings : Phase shift
(100.2000) Image processing : Digital image processing
(100.6640) Image processing : Superresolution
(180.0180) Microscopy : Microscopy
(090.1995) Holography : Digital holography
(070.6120) Fourier optics and signal processing : Spatial light modulators
ToC Category:
Holography
History
Original Manuscript: August 29, 2012
Revised Manuscript: October 23, 2012
Manuscript Accepted: November 8, 2012
Published: November 30, 2012
Virtual Issues
Vol. 8, Iss. 1 Virtual Journal for Biomedical Optics
Citation
Vicente Micó, Zeev Zalevsky, and Javier Garcia, "Superresolved common-path phase-shifting digital inline holographic microscopy using a spatial light modulator," Opt. Lett. 37, 4988-4990 (2012)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-37-23-4988
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