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:
Nov. 08, 2016
Filed:
Jun. 24, 2015
Ricoh Imaging Company, Ltd., Tokyo, JP;
Masakazu Terauchi, Tochigi, JP;
RICOH IMAGING COMPANY, LTD., Tokyo, JP;
Abstract
An autofocus device comprising includes a lens drive system for translating a lens, a first in-focus position detector for detecting a first in-focus position while translating the lens in a first direction by the lens drive system and a second in-focus position detector for detecting a second in-focus position while translating the lens in a direction opposite with respect to the first direction by the lens drive system, the second in-focus position detector operating after the first in-focus position is detected. A backlash detector detects a backlash in the lens drive system according to the first and the second in-focus positions.