2/5/2025 | 9:30 AM - 10:30 AM | Grand Peninsula C

A 6-tap 720x488-pixel short-pulse indirect time of flight image sensor with 30-phase demodulation for 100m outdoor operation

Author(s)

Koji Itaba | Shizuoka University
Keita Yasutomi | Shizuoka University
Keiichiro Kagawa | Shizuoka University
Kamel Mars | Shizuoka Institute of Science and Technology
Shoji Kawahito | Shizuoka University

Abstract

 Long-range measurement with ambient light tolerance has been achieved using a 720x488-resolution short-pulse-based indirect time-of-flight (SP-iToF) image sensor, featuring 6-tap, single-drain pixels, fabricated with a 110nm FSI process. The sensor performs 30-phase light-pulse delay measurements in both direct and indirect modes, utilizing the 6-tap pixels and five range-shifted sub-frame readouts, each with a readout time of 4.4ms. By leveraging multi-phase SP-iToF measurements with reduced parasitic light sensitivity and high demodulation contrast in 6-tap pixels, the sensor successfully reduces ambient light charge from direct sunlight, enabling accurate 100m distance measurements at 10 fps under 100 klux illumination, with depth noise of less than 1%.