An 80 x 25 pixel CMOS single-photon sensor with flexible on-chip time gating of 40 subarrays for solid-state 3-D range imaging
Ruokamo, Henna; Hallman, Lauri W.; Kostamovaara, Juha (2018-11-20)
H. Ruokamo, L. W. Hallman and J. Kostamovaara, "An 80 x 25 Pixel CMOS Single-Photon Sensor With Flexible On-Chip Time Gating of 40 Subarrays for Solid-State 3-D Range Imaging," in IEEE Journal of Solid-State Circuits. doi: 10.1109/JSSC.2018.2878816
© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
https://rightsstatements.org/vocab/InC/1.0/
https://urn.fi/URN:NBN:fi-fe2018123151742
Tiivistelmä
Abstract
A CMOS solid-state 3-D range imager that uses short (~110 ps) laser pulses and a novel flexible time gating scheme for a single-photon avalanche diode (SPAD) array is presented. The array is divided into 40 subarrays for which a narrow (<0.8 ns) time gating position can be set and scanned independently. The imager can be set to measure multiple regions of interest by means of the flexible time gating of the subarrays. The time gating for each of the subarrays is selected separately with an on-chip delay-locked loop (DLL) block that has 240 outputs and a delay grid of ~ 100 ps. The prototype has 80 x 25 pixels overall with 10 x 5 pixel subarrays. The fill factor of the sensor area is 32%. A 3-D range image is demonstrated at ~ 10 frames/s with centimeter-level precision in the case of passive targets within a range of ~4 m and a field of view of 18° x 28°, requiring an average active illumination power of only 0.1 mW.
Kokoelmat
- Avoin saatavuus [37647]