Photography – Exposure control system responsive to focal length
Reexamination Certificate
2010-06-03
2011-11-15
Blackman, Rochelle-Ann J (Department: 2862)
Photography
Exposure control system responsive to focal length
C396S349000, C396S458000, C396S462000, C396S505000, C348S240990, C348S363000, C359S676000, C359S740000
Reexamination Certificate
active
08059953
ABSTRACT:
A zoom lens includes a zoom optical system including movable lens groups for zooming which are moved between a ready-to-photograph position and an accommodated position, a diaphragm mechanism, and a lens shutter. One of the movable lens groups serves as an aperture-control lens group. The diaphragm mechanism and the lens shutter are positioned in front of and behind the aperture-control lens group and are movable relative to the aperture-control lens group in the optical axis direction. The diaphragm and the lens shutter are moved to close positions to the aperture-control lens group when the movable lens groups are moved to the accommodated position. Both apertures of the diaphragm mechanism and of the lens shutter are widely opened to allow the aperture-control lens group to partly enter the apertures when the diaphragm mechanism and the lens shutter are moved to the close positions.
REFERENCES:
patent: 6835006 (2004-12-01), Tanaka et al.
patent: 2009/0123145 (2009-05-01), Nomura
patent: 2003-66311 (2003-03-01), None
Hiroshi Nomura, “Retractable Zoom Lens Having Variable Aperture-Stop Mechanism”, U.S. Appl. No. 12/795,062, filed Jun. 7, 2010.
Hiroshi Nomura, “Retractable Zoom Lens Having a Variable Aperture-Stop Mechanism”, U.S. Appl. No. 12/817,239, filed Jun. 17, 2010.
Blackman Rochelle-Ann J
Greenblum & Bernstein P.L.C.
Hoya Corporation
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