Triangulation data integrity
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United States of America Patent
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-
Nov 10, 1987
Grant Date -
N/A
app pub date -
Oct 3, 1984
filing date -
Oct 3, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Disclosed is an improved electro-optical triangulation distance sensing method and apparatus incorporating a reference detector to detect light returned from an object surface and so control light power, integration time (or other characteristic) of the primary image sensing photodetector. Ideally the reference detector is the same size as the primary photodetector and positioned effectively to see the same image of a zone of light projected on the object surface. Also disclosed are useful calibration methods for such sensors.
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