Speed considerations for LDPD based time-of-flight CMOS 3D image sensors

Andreas Suss,Christian Nitta,Andreas Spickermann,Daniel Durini,Gabor Varga, Melanie Jung,Werner Brockherde,B J Hosticka,H Vogt,Stefan Schwope

ESSCIRC（2013）

引用 4|浏览10

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摘要

Recently a 128×96 pixel range imager with a pitch of 40 μm and a fill factor of 38 % was presented for 3D range imaging measurements based on the pulse modulated (PM) time-of-flight (ToF) principle. This sensor employs a high-speed photodetector called lateral drift-field photodiode (LDPD). During the characterization insufficiencies in charge transfer were observed for low-light illumination. Here, characterization and analysis of the former imager is given and a redesign that circumvents the parasitic effects is demonstrated and verified by measurements on chip and on camera level.

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关键词

cmos image sensors,charge exchange,distance measurement,lighting,photodetectors,photodiodes,pulse modulation,3d range imaging measurement,ldpd,pm tof principle,charge transfer,fill factor,lateral drift field photodiode,light illumination,parasitic effect,photodetector,time of flight cmos 3d image sensor

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