Apparatus for continuously photographing road surface
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United States of America Patent
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Aug 29, 1989
Grant Date -
N/A
app pub date -
Apr 24, 1987
filing date -
Dec 10, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention relates to an apparatus for continuously photographing a road surface. The apparatus has a motion picture camera attached to an outside upper part of a vehicle body, a road surfacial light projector for projecting a beam of light onto a road surface to be photographed by the motion picture camera, and a vehicle speed detector so that an iris and a film feed speed of the motion picture camera may be controlled according to an output of the vehicle speed detector. According to such an arrangement, it has such advantages that a large-sized, expensive and large control apparatus is not required and also a lifetime of a lamp of the light projector is elongated.
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