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:
Dec. 17, 2013
Filed:
Dec. 14, 2011
Akira Ando, Chigasaki, JP;
Toshiyuki Yokoyama, Hitachinaka, JP;
Tomoaki Nishiguchi, Hitachinaka, JP;
Akira Ando, Chigasaki, JP;
Toshiyuki Yokoyama, Hitachinaka, JP;
Tomoaki Nishiguchi, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
For preventing frequent use of auto-focus control and also for acquiring stable in-focus positions for target-objects, this invention comprises system control sectionhaving a second mode to drive magnification adjustment lensor focus adjustment lensupon a user command, and a third mode to transition to a first mode under pre-determined conditions in the second mode, and to set in-focus states of a lens group, wherein system control sectionstores a reference target-object distance in reference target-object distance storage sectionwhen focus adjustment lensis driven by user commands in the second mode, drives focus adjustment lensnot based on a current target-object distance but the lens in-focus trajectory data to retain the reference target-object distance when the magnification adjustment lensis driven by user commands, and re-transitions to the second mode without updating the reference target-object distance, after the third mode.