Apparatus and method for sensing distance
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United States of America Patent
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Nov 20, 1984
Grant Date -
N/A
app pub date -
Oct 15, 1981
filing date -
Oct 15, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus for sensing the distance from a reference point to a remote object comprises a light source and optics to project light from the light source onto the remote object. One component of the optics is a movable mirror which is used to position the projected light on a remote object. A sensor is provided to detect the position of the projected light on the remote object. In response to position information from the sensor, control circuitry produces a drive signal which controls a galvanometer. The galvanometer shaft is attached to rotate the mirror. When the mirror has been positioned such that the projected light impinges on the remote object at a predetermined location, the value of the drive signal can be used to compute the distance to the remote object by triangulation.
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