Title :
A 120×110 position sensor with the capability of sensitive and selective light detection in wide dynamic range for robust active range finding
Author :
Oike, Yusuke ; Ikeda, Makoto ; Asada, Kunihiro
Author_Institution :
Dept. of Eng., Univ. of Tokyo, Japan
Abstract :
A 120×110 sensitive and light selective position sensor array with wide dynamic range is presented. The sensor can detect the position of a low-intensity light projected on nonuniform background illumination for a robust range finding system. It achieves -18-dB signal-to-background ratio (SBR) light detection in wide range of 48-dB background illumination due to a modulated light projection and correlation technique on the sensor plane. It also realizes selective light detection for multiple light projection systems. The range finder has been fabricated in 0.6-μm CMOS process and successfully tested. The range finding system achieves <1.5-mm range accuracy at 1000 mm using a low-intensity projected laser beam in a nonuniform target scene.
Keywords :
CMOS image sensors; distance measurement; optical sensors; position measurement; 0.6 micron; 1.5-mm range accuracy; 120×110 position sensor; 48-dB background illumination; CMOS process; SBR light detection; correlation technique; image sensor; low-intensity light; low-intensity projected laser beam; modulated light projection; multiple light projection systems; nonuniform background illumination; nonuniform target scene; range finding system; robust active range finding; selective light detection; sensitive light detection; sensor array; sensor plane; signal-to-background ratio; wide dynamic range; CMOS process; Dynamic range; Lighting; Optical arrays; Optical modulation; Position sensitive particle detectors; Robustness; Sensor arrays; Sensor systems; Testing;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2003.820880
