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Maskless imaging of dense samples using pixel super-resolution based multi-height lensfree on-chip microscopyAlon Greenbaum and Aydogan Ozcan »View Author Affiliations
Alon Greenbaum1
and Aydogan Ozcan1,2,3,*
1Electrical Engineering Department, University of California, Los Angeles, CA 90095, USA 2Bioengineering Department, University of California, Los Angeles, CA 90095, USA 3California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA
*Corresponding author: ozcan@ucla.edu |
Optics Express, Vol. 20, Issue 3, pp. 3129-3143 (2012)
http://dx.doi.org/10.1364/OE.20.003129
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Abstract
Lensfree in-line holographic microscopy offers sub-micron resolution over a large field-of-view (e.g., ~24 mm2) with a cost-effective and compact design suitable for field use. However, it is limited to relatively low-density samples. To mitigate this limitation, we demonstrate an on-chip imaging approach based on pixel super-resolution and phase recovery, which iterates among multiple lensfree intensity measurements, each having a slightly different sample-to-sensor distance. By digitally aligning and registering these lensfree intensity measurements, phase and amplitude images of dense and connected specimens can be iteratively reconstructed over a large field-of-view of ~24 mm2 without the use of any spatial masks. We demonstrate the success of this multi-height in-line holographic approach by imaging dense Papanicolaou smears (i.e., Pap smears) and blood samples.
© 2012 OSA
OCIS Codes
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(090.1995) Holography : Digital holography
ToC Category:
Holography
History
Original Manuscript: December 23, 2011
Revised Manuscript: January 15, 2012
Manuscript Accepted: January 18, 2012
Published: January 25, 2012
Virtual Issues
Vol. 7, Iss. 3 Virtual Journal for Biomedical Optics
Citation
Alon Greenbaum and Aydogan Ozcan, "Maskless imaging of dense samples using pixel super-resolution based multi-height lensfree on-chip microscopy," Opt. Express 20, 3129-3143 (2012)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-20-3-3129
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Cytometry A
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Phys. Rev. B
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PLoS ONE
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