Trillion Sensors Summit held on Nov. 12-13, 2014 in San Diego, publishes Rambus presentation "Lensless Computational Image Sensors as a Foundation for New Opportunities in Biotech" by David Stork. Few slides out of 32:
CEA-Leti too presented its lens-free biomedical imaging, although little details on the operating principle were given.
Lensless diffraction gratings unlikely provide color-true reconstruction. What is likely the crosstalk, FOV, PRNU and poor pixel symmetry to be severe.
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