Photography – Having variable focal length of camera objective – Having focus operation
Patent
1997-12-18
1999-08-24
Adams, Russell
Photography
Having variable focal length of camera objective
Having focus operation
396 81, G03B 1700
Patent
active
059435135
ABSTRACT:
Zooming systems consistent with the present invention are used with a camera having a zoom lens barrel which moves in at least two zoom directions. The zooming system comprises a switch for selecting a zooming operation of the camera. An encoder detects a zoom position of the zoom lens barrel and generates a zoom position signal representing the detected zoom position. A memory stores focus error data for each zoom position and for each zoom direction at each zoom position. A zoom motor driver drives a zoom motor which moves the zoom lens barrel in the zoom directions. Finally, a controller controls the camera by: driving the zoom motor in a motor direction while the switch means is turned on; driving the zoom motor for a predetermined period of time in the motor direction after the switch is turned off; and calculating an auto focus correction value based on the detected zoom position and the focus error data corresponding to the detected zoom position.
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Adams Russell
Samsung Aerospace Industries, Inc.
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