Fitzpatrick Institute for Photonics Seminar: Quanta Image Sensor (QIS) Concept and Progress

Feb 20

Friday, February 20, 2015

12:00 pm - 1:00 pm
Fitzpatrick Center Schiciano Auditorium Side A

Presenter

Dr. Eric R. Fossum

The Quanta Image Sensor (QIS) was conceived when contemplating shrinking pixel sizes and storage capacities, and the steady increase in digital processing power. In the single-bit QIS, the output of each field is a binary bit plane, where each bit represents the presence or absence of at least one photoelectron in a photodetector. A series of bit planes is generated through high speed readout, and a kernel or "cubicle" of bits (X,Y, t) is used to create a single output image pixel. The size of the cubicle can be adjust post-acquisition to optimize image quality. The specialized sub-diffraction-limit photodetectors in the QIS are referred to as "jots" and a QIS may have a gigajot or more, read out at 1000 fps, for a data rate exceeding 1Tb/s. Basically, we are trying to count photons as they arrive at the sensor. Recent progress towards realizing the QIS for commercial and scientific purposes will be discussed. This includes investigation of a pump-gate jot device implemented in a 65nm process, power efficient readout electronics, currently less than 20pJ/b in 0.18 um CMOS, creating images from jot data with high dynamic range, and understanding the imaging characteristics of single-bit and multi-bit QIS devices, such as the inherent and interesting film-like D-log(H) characteristic. If successful, the QIS will represent a major paradigm shift in image capture.

Contact

Ginsberg, Margo
660-5254
margo.ginsberg@duke.edu

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