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Proceedings Paper

Optical coding of SPAD array and its application in compressive depth and transient imaging
Author(s): Qilin Sun; Xiong Dun; Yifan Peng; Wolfgang Heidrich
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Paper Abstract

Time-of- ight depth imaging and transient imaging are two imaging modalities that have recently received a lot of interest. Despite much research, existing hardware systems are limited either in terms of temporal resolution or are prohibitively expensive. Arrays of Single Photon Avalanche Diodes (SPADs) are promising candidates to fill this gap by providing higher temporal resolution at an affordable cost. Unfortunately, state-of-the-art SPAD arrays are only available in relatively small resolutions and low fill-factor. Furthermore, the low fill-factor issue leads to more ill-posed problems when seeking to realize the super-resolution imaging with SPAD array. In this work, we target on hand-crafting the optical structure of SPAD array to enable the super-resolution design of SPAD array. We particularly investigate the scenario of optical coding for SPAD array, including the improvement of fill-factor of SPAD array by assembling microstructures and the direct light modulation using a diffractive optical element. A part of the design work has been applied in our recent advance, where here we show several applications in depth and transient imaging.

Paper Details

Date Published: 18 November 2019
PDF: 7 pages
Proc. SPIE 11187, Optoelectronic Imaging and Multimedia Technology VI, 111870D (18 November 2019); doi: 10.1117/12.2538783
Show Author Affiliations
Qilin Sun, King Abdullah Univ. of Science and Technology (Saudi Arabia)
Xiong Dun, Tongji Univ. (China)
Yifan Peng, Stanford Univ. (United States)
Wolfgang Heidrich, King Abdullah Univ. of Science and Technology (Saudi Arabia)

Published in SPIE Proceedings Vol. 11187:
Optoelectronic Imaging and Multimedia Technology VI
Qionghai Dai; Tsutomu Shimura; Zhenrong Zheng, Editor(s)

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