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:
Aug. 24, 2010
Filed:
Mar. 06, 2009
Hiroshi Nomura, Saitama, JP;
Ken Endo, Saitama, JP;
Hiroshi Nomura, Saitama, JP;
Ken Endo, Saitama, JP;
Hoya Corporation, Tokyo, JP;
Abstract
An optical element position control mechanism includes an optical element holding member, a lead screw rotatable on a rotational axis parallel to movement direction of the optical element holding member, a linearly moving nut screw-engaged with the lead screw and engaged with the optical element holding member, and a rotation prevention device preventing the linearly moving nut from rotating about the lead screw. Rotations of the lead screw cause the linearly moving nut to move along the lead screw, a position of the optical element holding member being determined by the linearly moving nut. A biasing device is positioned between the linearly moving nut and the optical element holding member and is resiliently deformable in a plane substantially parallel to a plane which includes the rotational axis of the lead screw, and applies a biasing force against the linearly moving nut so as to be prevented from rotating.