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Opt Express. 2010 Mar 1;18(5):4717-26. doi: 10.1364/OE.18.004717.

On-chip differential interference contrast microscopy using lensless digital holography.

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Electrical Engineering Department, University of California, Los Angeles, CA, USA.


We introduce the use of a birefringent crystal with lensless digital holography to create an on-chip differential interference contrast (DIC) microscope. Using an incoherent source with a large aperture, in-line holograms of micro-objects are created, which interact with a uniaxial crystal and an absorbing polarizer, encoding differential interference contrast information of the objects on the chip. Despite the fact that a unit fringe magnification and an incoherent source with a large aperture have been used, holographic digital processing of such holograms rapidly recovers the differential phase contrast image of the specimen over a large field-of-view of approximately 24 mm(2).


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