Laser scanner with integral distance measurement system
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United States of America Patent
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May 4, 1999
Grant Date -
N/A
app pub date -
Jun 30, 1997
filing date -
Jun 30, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a scanner for reading coded symbologies. The invention uses a coherent, visible light source for illuminating the coded symbol during a scan and a detecting means for collecting the reflected light energy from the coded symbol. The invention also employs an invisible light source illuminating the coded symbol during the scan and a one-dimensional position-sensitive detector whose field of view receives images of the illuminating beam. The position-sensitive detector outputs a current which is processed to detect the presence and compute the distance of an object being scanned. Both the visible and invisible light sources from the scanner travel along a shared, coaxial path to and from the object.
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