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:
Jul. 24, 2012
Filed:
May. 27, 2011
Akira Ando, Chigasaki, JP;
Toshiyuki Yokoyama, Hitachinaka, JP;
Hideharu Ono, Mito, JP;
Tomoaki Nishiguchi, Mito, JP;
Hiroyuki Miyahara, Hitachinaka, JP;
Akira Ando, Chigasaki, JP;
Toshiyuki Yokoyama, Hitachinaka, JP;
Hideharu Ono, Mito, JP;
Tomoaki Nishiguchi, Mito, JP;
Hiroyuki Miyahara, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In order to obtain stable lens positions to have an object imaged in focus when the temperature of lenses changes, an imaging device of the present invention comprises a system control sectionhaving a imaging mode and a correction mode, the imaging mode in which a group of lensesare controlled and moved to focusing positions for a predetermined distance at first and are further moved to correct the focusing positions for the predetermined distance to the object during imaging according to the temperature compensation data, the correction mode in which the group of lensesare controlled and moved to have the temperature compensation data corrected when the temperature change is larger than or equal to a predetermined temperature difference, a correction coefficient calculation sectionfor calculating the correction coefficient to correct the temperature compensation data based on first focusing positions of the group of lenses to which the group of lenses are moved according to the temperature compensation data before corrected and second focusing positions of the group of the lenses to which the group of the lenses are automatically moved from the first focusing positions to have the object the predetermined distance away imaged in focus based on the focus evaluation value under a condition under which a moving range of the group of lenses is restricted, when the system control section is on the correction mode, a temperature compensation data correction sectionfor correcting the temperature compensation data to be used for the imaging mode based on the correction coefficient calculated by the correction coefficient calculation section.