Image generating device having automatic focus correction based

Details Image generating device having automatic focus correction based Image generating device having automatic focus correction based

1996-07-19

2000-03-07

Tung, Bryan

Television

Camera, system and detail

Optics

H04N 5232, G03B 1300

Patent

active

060347260

ABSTRACT:
A lens driving device for an image pickup apparatus in which there is no problem of defocusing of an object caused by changes in the light stop state after manual or automatic focusing with respect to an object. The lens driving device includes a focusing correction amount calculation circuit 27 for calculating the amount of focus correction from the focus position from a focus position detection circuit 26 responsive to the zooming position from a zooming position detection circuit 28 and to a signal S.sub.1 from a light stop value sensor 13. The lens driving device also includes an adder 24 for summing the focusing correction amount to the focusing displacement from an autofocusing displacement calculation circuit 21 or a manual focusing displacement calculation circuit 22 via a signal switching unit 23. The resulting sum is outputted as a displacement of a focusing lens.

REFERENCES:
patent: 4748509 (1988-05-01), Otake
patent: 5075713 (1991-12-01), Sakata
patent: 5144492 (1992-09-01), Iijima
patent: 5182649 (1993-01-01), Miyazaki
patent: 5574502 (1996-11-01), Haruki
patent: 5629735 (1997-05-01), Kaeda

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