Imaging apparatus

Details Imaging apparatus Imaging apparatus

2009-12-14

2011-11-08

LaBalle, Clayton E (Department: 2862)

Photography

Camera detail

Diaphragm

Reexamination Certificate

active

08052340

ABSTRACT:
A light quantity adjuster includes: a blade member forming an aperture; a stepping motor that moves the blade member to open/close the aperture; and a control section that controls driving of the stepping motor, and increases a rotational speed of the stepping motor after a resistance acting on the stepping motor changes from static friction to dynamical friction in case of closing the aperture.

REFERENCES:
patent: 5953062 (1999-09-01), Sugimori et al.
patent: 6535691 (2003-03-01), Kobayashi
patent: 07159853 (1995-06-01), None
patent: 2002072327 (2002-03-01), None
patent: 2002156683 (2002-05-01), None
patent: 2004-012938 (2004-01-01), None
patent: 2005242114 (2005-09-01), None
patent: 2007047289 (2007-02-01), None
Office Action from Japanese Application No. 2008-326273, dated Sep. 7, 2010.
Office Action from Japanese Application No. 2008-326273, dated Feb. 8, 2011.

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