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Light-field imaging using angle-sensitive pixels in standard CMOS

Event Details

Event Dates: 

Monday, February 25, 2013 - 9:00am

Speaker Name(s): 

Alyosha Molnar

Speaker Affiliation(s): 

Cornell University
Seminar Type/Subject

Event Details & Abstract: 

Whereas traditional image sensors map the intensity of light at a particular plane, a light-field image sensor should capture a more complete description of the field of light rays. In particular, by mapping the distribution of incident angle in a scene, Light-field imaging permits passive extraction of 3-D structure. I will present a new type of pixel, the "angle-sensitive pixel" (ASP), based on the Talbot effect, and built in a standard CMOS manufacturing process. ASPs use stacked diffraction gratings built from metal interconnect layers to generate a strongly angle-sensitive light response. An appropriately chosen mosaic of ASPs, provides a much richer description of incoming light from out-of-focus scenes, and does so in a computationally compact format, similar to the Gabor filters used in many image-processing applications. I will discuss several applications for arrays of ASPs, including digital light-field photography, lensless far-field imaging, and near-field lensless 3-D imaging of microscale samples.