Distance detector device
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United States of America Patent
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Apr 1, 1986
Grant Date -
N/A
app pub date -
Dec 20, 1982
filing date -
Dec 21, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Light projected from an active lighting means to an object is reflected by the object, and a light spot is produced on a light-sensitive element by the light reflected from the object. The distance to the object is determined by detecting the position of the light spot on the light-sensitive element. The light-sensitive element for receiving the reflected light from the object has formed on a portion of a surface thereof an insensitive zone which has the same width or the same area as the light image produced by the reflected light and the light-sensitive element moves on an image plane in a certain relationship with the distance to the object whereby a change in a photoelectric output of the light-sensitive element is detected to detect the distance to the object.
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