Apparatus for generating a light curtain
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United States of America Patent
Stats
-
Jan 14, 1992
Grant Date -
N/A
app pub date -
Jul 10, 1990
filing date -
Jul 18, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus is described for generating a light curtain which includes an originally spherical strip-like concave mirror 10 and a light deflecting element 12 arranged in the vicinity of the focal point of the concave mirror. The light deflecting element 12 guides a bundled light beam periodically over the concave mirror 10. The strip-like concave mirror 10 is twisted within itself in such a way that each surface portion of the concave mirror 10 which is illuminated during a complete sweep of the light beam extends at at least substantially the same angle to the beam axis in a plane perpendicular to the scanning direction.
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Cited Art Landscape
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