Abstract:
This paper presents a camera prototype for 2D/3D image capture in low illumination conditions based on single-photon avalanche-diode (SPAD) image sensor for direct time-o...Show MoreMetadata
Abstract:
This paper presents a camera prototype for 2D/3D image capture in low illumination conditions based on single-photon avalanche-diode (SPAD) image sensor for direct time-offlight (d-ToF). The imager is a 64×64 array with in-pixel TDC for high frame rate acquisition. Circuit design techniques are combined to ensure successful 3D image capturing under low sensitivity conditions and high level of uncorrelated noise such as dark count and background illumination. Among them an innovative time gated front-end for the SPAD detector, a reverse start-stop scheme and real-time image reconstruction at Ikfps are incorporated by the imager. To the best of our knowledge, this is the first ToF camera based on a SPAD sensor fabricated and proved for 3D image reconstruction in a standard CMOS process without any opto-flavor or high voltage option. It has a depth resolution of 1cm at an illumination power from less than 6nW/mm2 down to 0.1nW/mm2.
Date of Conference: 28-31 May 2017
Date Added to IEEE Xplore: 28 September 2017
ISBN Information:
Electronic ISSN: 2379-447X
Institute of Microelectronics of Seville (IMSE-CNM), CSIC-University of Seville (Spain)
Institute of Microelectronics of Seville (IMSE-CNM), CSIC-University of Seville (Spain)
Institute of Microelectronics of Seville (IMSE-CNM), CSIC-University of Seville (Spain)
Institute of Microelectronics of Seville (IMSE-CNM), CSIC-University of Seville (Spain)
Institute of Microelectronics of Seville (IMSE-CNM), CSIC-University of Seville (Spain)
Institute of Microelectronics of Seville (IMSE-CNM), CSIC-University of Seville (Spain)