A Hybrid ToF Image Sensor for Long-Range 3D Depth Measurement Under High Ambient Light Conditions

被引：11

作者：

Hatakeyama, Kunihiro ^{[1
]}

Okubo, Yu ^{[1
]}

Nakagome, Tomohiro ^{[1
]}

Makino, Masahiro ^{[2
]}

Takashima, Hiroshi ^{[2
]}

Akutsu, Takahiro ^{[3
]}

Sawamoto, Takehide ^{[3
]}

Nagase, Masanori ^{[3
]}

Noguchi, Tatsuo ^{[1
]}

Kawahito, Shoji ^{[3
,4
]}

机构：

[1] Toppan Inc, Tokyo 3458508, Japan

[2] TOPPAN TECH DESIGN CTR CO LTD, Tokyo 1100016, Japan

[3] Brookman Technol Inc, Hamamatsu 4300936, Japan

[4] Shizuoka Univ, Res Inst Elect, Hamamatsu 4328011, Japan

来源：

IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2023年 / 58卷 / 04期

基金：

日本学术振兴会;

关键词：

3D imaging; CMOS depth sensor; direct ToF (dToF); hybrid ToF (hToF); indirect ToF (iToF); interference; multi-tap pixel; time of flight (ToF); LOCK-IN PIXELS; LIDAR SENSOR;

D O I：

10.1109/JSSC.2023.3238031

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 new indirect time of flight (iToF) sensor realizing long-range measurement of 30 m has been demonstrated by a hybrid ToF (hToF) operation, which uses multiple time windows (TWs) prepared by multi-tap pixels and range-shifted subframes. The VGA-resolution hToF image sensor with 4-tap and 1-drain pixels, fabricated by the BSI process, can measure a depth of up to 30 m for indoor operation and 20 m for outdoor operation under high ambient light of 100 klux. The new hToF operation with overlapped TWs between subframes for mitigating an issue on the motion artifact is implemented. The sensor works at 120 frames/s for a single subframe operation. Interference between multiple ToF cameras in IoT systems is suppressed by a technique of emission cycle-time changing.

引用

页码：983 / 992

页数：10

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