A CMOS 3D camera with millimetric depth resolution
A 3D imager is presented capable of capturing the depth map of an arbitrary scene. Depth is measured by computing the time-of-flight of a ray of light as it leaves the source and is reflected by the objects in the scene. The round-trip time is converted to digital code independently for each pixel using a CMOS time-to-digital converter. To reach millimetric accuracies an array of 32×32 highly sensitive, ultra-low jitter CMOS detectors capable of detecting a single photon is used. The scene is illuminated using a cone of low power pulsed laser light, thus no mechanical scanning devices or expensive optical equipment are required.
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Keywords: 3-D image sensor; 3-D vision; CMOS avalanche photodiodes; Highly sensitive photodetectors; LIDAR; Photon timing; Rangefinder; Single photon detectors; SPAD arrays; Time-correlated measurements
Record created on 2006-03-09, modified on 2016-08-08