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. 15, 2010
Filed:
Jun. 21, 2007
Yuji Kogure, Saitama, JP;
Yuji Kogure, Saitama, JP;
Hoya Corporation, Tokyo, JP;
Abstract
A lens position detector for detecting a position of a movable lens group in an optical axis direction includes a manual operating ring, a rotation of the manual operating ring causing the movable lens group to move in the optical axis direction; a code plate installed in a barrel; and a conductive brush fixed to the manual operating ring, the rotation of the manual operating ring causing relative rotational sliding between the conductive brush and the code plate. A surface of the code plate with which the conductive brush is in sliding contact is inclined to a plane orthogonal to the optical axis at an angle of inclination substantially equal to a lead angle of male and female screw threads engaged with each other which are formed on the manual operating ring and the ring member, respectively.