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A 120×110 position sensor with the capability of sensitive and selective light detection in wide dynamic range for robust active range finding

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3 Author(s)
Oike, Y. ; Dept. of Eng., Univ. of Tokyo, Japan ; Ikeda, M. ; Asada, K.

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.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:39 ,  Issue: 1 )