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Volume: 30 | Article ID: art00003
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A Distance Measurement Method Using A Time-of-Flight CMOS Range Image Sensor with 4-Tap Output Pixels and Multiple Time-Windows
  DOI :  10.2352/ISSN.2470-1173.2018.11.IMSE-326  Published OnlineJanuary 2018
Abstract

In this study, advanced range measurement method using a TOF sensor with 4-tap output pixels and small-duty short light pulse is presented. A CMOS TOF range imager with pinnedphotodiode high-speed charge modulator pixels using lateral electric field (LEF) control has been implemented by a 0.11-μm CIS process with high near infrared sensitivity. In order to improve the range resolution while maintaining the measurable range, multiple time-windows are used for range measurements. Compared with the conventional single time window, the use of N time-windows theoretically improve the range resolution by a factor of N1.5 if the back ground light shot noise is dominant. In the measurement for N=2, the range resolution is improved by a factor of 2.8 compared with the case of N=1 while maintaining the same distance range.

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Kohei Yamada, Komazawa Akihito, Taishi Takasawa, Keita Yasutomi, Keiichiro Kagawa, Shoji Kawahito, "A Distance Measurement Method Using A Time-of-Flight CMOS Range Image Sensor with 4-Tap Output Pixels and Multiple Time-Windowsin Proc. IS&T Int’l. Symp. on Electronic Imaging: Image Sensors and Imaging Systems,  2018,  pp 326-1 - 326-4,  https://doi.org/10.2352/ISSN.2470-1173.2018.11.IMSE-326

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