Photography – Having variable focal length of camera objective – Having focus operation
Reexamination Certificate
2007-02-15
2009-12-15
Koval, Melissa J (Department: 2862)
Photography
Having variable focal length of camera objective
Having focus operation
C348S345000, C348S357000, C396S133000
Reexamination Certificate
active
07634182
ABSTRACT:
A lens apparatus which can remove a backlash positively is provided. In the lens apparatus, a drive source is controlled so as to performing: moving a focus lens from a reference position toward one end of an optical lens stroke, and moving the focus lens toward the other end of the optical lens stroke. When the focus lens reaches the other end of the optical lens stroke, the drive source is controlled so as to perform moving the focus toward the reference position, and further, when a focus point position is determined to be between the reference position and the other end of the optical lens stroke as well as when it is detected that the focus lens reaches the reference position, the drive source is controlled so as to perform moving the focus lens from the reference position toward one end of the optical lens stroke by an amount to removal of a backlash, and moving the focus lens up to the focus point position.
REFERENCES:
patent: 5774748 (1998-06-01), Ito et al.
patent: 6014523 (2000-01-01), Oono et al.
patent: 6055378 (2000-04-01), Oono et al.
patent: 6282379 (2001-08-01), Ide et al.
patent: 19757342 (1998-06-01), None
patent: 1494464 (2005-01-01), None
patent: 1-257924 (1989-10-01), None
patent: 5-58163 (1993-08-01), None
patent: 8-86951 (1996-04-01), None
patent: 2773876 (1998-04-01), None
Birch & Stewart Kolasch & Birch, LLP
Fujinon Corporation
Koval Melissa J
LandOfFree
Lens apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lens apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lens apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4057542