The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 14, 2011
Filed:
Mar. 03, 2010
Osamu Yamamoto, Shimotsuke, JP;
Osamu Yamamoto, Shimotsuke, JP;
Canon Kabushiki Kaisha, , JP;
Abstract
A lens apparatus comprises a barrelwhich houses an imaging optical system including magnification-varying lens unitsand, a focus lens unit, and a beam separation elementwhich separates a part of a light beam from an object out of a light beam directed to an imaging surface, operating members, anddisposed on an outer circumference of the barrel and configured to be manually operated, a drive unitdisposed outside the barrel and including actuatorsandwhich drives each of the magnification-varying lens unit and the focus lens unit, and a controllerwhich controls the actuator, and a focus detectordisposed outside the barrel and configured to detect a focus state of the imaging optical system using the light beam separated by the beam separation element. The focus detector is embedded in the drive unit.