A time-of-flight range image sensor using high-speed 4-tap lock-in pixels

A. Komazawa; H. Trang; T. Takasawa; S. Aoyama; K. Yasutomi; K. Kagawa; S. Kawahito

doi:10.1117/12.2270543

20 February 2017 A time-of-flight range image sensor using high-speed 4-tap lock-in pixels

A. Komazawa, H. Trang, T. Takasawa, S. Aoyama, K. Yasutomi, K. Kagawa, S. Kawahito

Proceedings Volume 10328, Selected Papers from the 31st International Congress on High-Speed Imaging and Photonics; 1032806 (2017) https://doi.org/10.1117/12.2270543
Event: 31st International Congress on High-Speed Imaging and Photonics, 2016, Osaka, Japan

Abstract

This paper presents a CMOS Time-of-Flight (TOF) range imager using pinned-photodiode based high-speed 4-tap lock-in pixels with lateral-electric-field charge modulators (LEFM) in a 0.11 um CIS process. The proposed lock-in pixel structure using lateral electric field control is suitable for implementing a multiple-tap charge modulator while achieving high-speed charge transfer for high time resolution. The TOF imager with the multiple-tap charge modulators is expected to have background light cancelling capability in one frame and to improve range resolution with the 4 time windows for a range-shifted light pulse. Measurement results of the implemented TOF imager with 160×240 pixels are reported.

Citation Download Citation

A. Komazawa, H. Trang, T. Takasawa, S. Aoyama, K. Yasutomi, K. Kagawa, and S. Kawahito "A time-of-flight range image sensor using high-speed 4-tap lock-in pixels", Proc. SPIE 10328, Selected Papers from the 31st International Congress on High-Speed Imaging and Photonics, 1032806 (20 February 2017); https://doi.org/10.1117/12.2270543

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