Classroom 4, Hudson Beare Building
"Time for Temporal Imaging: A 320x240 Oversampled Digital Single Photon Counting Image Sensor"
Mr. Neale Dutton, Institute for Integrated Micro and Nano Systems
Single photon avalanche diodes (SPAD) are the ultimate imaging detection method. Each photon is immediately represented as a spiking digital pulse whose leading edge signals the photon’s time of arrival with picosecond precision. SPADs have recently been proposed for the digital film sensor or Quanta Image Sensor (QIS) concept: to create a single photon oversampled binary camera with billions of pixels. The aim of our research is to examine the suggestion that CMOS SPADs could be compactly and efficiently arranged alongside analogue pixel electronics to form scalable pixel building blocks to produce megapixel time-resolved single photon image sensors to be exploited in a range of applications. This presentation will focus on our recent work creating a high spatial and temporal resolution 320x240 SPAD-based camera. The single photon counting image sensor is implemented in 0.13μm imaging CMOS with state of the art 8μm pixel pitch at 26.8% fill factor. The imager is demonstrated operating as a global shutter (GS) oversampled binary image sensor reading out at 5.14kFPS. Frames are accumulated in real time on FPGA to construct a 256 photon/8bit output image at 20FPS.
Neale Dutton is a final year PhD student in IMNS in Dr Robert Henderson's "CMOS Sensors and Systems" research group. He is supervised by Dr Henderson and Prof Ian Underwood. His research interests are in time-resolved imaging, single photon imaging, 3D vision, time of flight imaging and mixed-signal system design.
Event Contact Name:
Dr. Jonathan Terry