Optical apparatus

Details Optical apparatus Optical apparatus

2005-08-02

2005-08-02

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S738000, C359S740000, C396S079000

Reexamination Certificate

active

06924941

ABSTRACT:
An optical apparatus is disclosed which comprises an optical system provided with a zoom lens for performing zooming by moving along the optical axis and a focus lens for performing correction and focusing at the time of zooming, an imaging device for imaging an optical image supplied from the optical system, a zoom actuator for driving the zoom lens, a focus actuator for driving the focus lens, a zoom position detecting device for detecting the position of the zoom lens, a focus position detecting device for detecting the position of the focus lens, an aperture stop member whose opening diameter changes so as to adjust the luminous energy passing through the optical system a filter member to be freely inserted into or extracted from the optical path of the optical system, an aperture stop state detecting device for detecting the opening state of the aperture stop member, a filter state detecting device for detecting the insertion state of the filter member, a memory storing the movement information on the relation between the position of the zoom lens for keeping a focused state and the position of the focus lens, and a control device for correcting the movement information in accordance with an output of the aperture stop state detecting device and an output of the filer state detecting device and controlling driving of the focus lens.

REFERENCES:
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patent: 6292308 (2001-09-01), Tsuzuki et al.
patent: 2002/0008772 (2002-01-01), Kaneda
patent: 2002/0101531 (2002-08-01), Kaneda
patent: 2002/0118966 (2002-08-01), Hofer et al.
patent: 2004/0201707 (2004-10-01), Noguchi et al.
patent: 11-72691 (1999-03-01), None
patent: 11-289487 (1999-10-01), None
patent: 11-305107 (1999-11-01), None

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