A CMOS smart pixel for active 3-D vision applications

被引：23

作者：

Viarani, L ^{[1
]}

Stoppa, D ^{[1
]}

Gonzo, L ^{[1
]}

Gottardi, M ^{[1
]}

Simoni, A ^{[1
]}

机构：

[1] IRST, ITC, Integrated Opt Sensors Grp, I-38050 Trent, Italy

来源：

IEEE SENSORS JOURNAL | 2004年 / 4卷 / 01期

关键词：

indirect time-of-flight (TOF); laser radar; optical sensor;

D O I：

10.1109/JSEN.2003.822217

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A CMOS smart pixel aimed at three-dimensional vision applications is introduced. It is suitable for scannerless laser ranging systems which employ the indirect time-of-flight measuring technique to recover distance information. The pixel is operated with trains of light pulses generated by an external source to illuminate the scene and contains most of the processing electronics to perform signal accumulation and noise reduction operations. The smart pixel architecture includes an N-well photodiode plus a self-biasing voltage amplifier and a switched-capacitor fully differential stage. The pixel is fabricated in standard CNIOS 0.6 mum technology and measures 180 x 160 mum(2) (including the photodiode) with a fill factor of 14%. Electrooptical test results confirm the smart pixel functionality in a range of distance from 3 in to 9 m, and the accuracy achieved for preliminary distance measurements is 15 cm. Both the accuracy and the extension of the range of distance are supposed to be improved by reducing setup and environmental noise contributions that limit the pixel performance.

引用

页码：145 / 152

页数：8

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