Device for assistance in the optical focusing of a television camera, and camera provided with such a device
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United States of America Patent
Stats
-
Aug 30, 1994
Grant Date -
N/A
app pub date -
Sep 12, 1991
filing date -
Sep 19, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A device for assistance in the optical focusing of the objective of a camera comprises a contour extraction circuit coupled to a marker generator, the output of which is connected to a combination circuit furthermore receiving the video signal from the camera. The resultant composite signal is applied to the viewfinder. Thus a marker, the position of which in the image is a function of the focusing, appears in the viewfinder, the focusing being obtained when the marker is in an extreme position on its axis of shift. The device can be applied notably to the focusing of high-definition television cameras.
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Family
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Cited Art Landscape
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