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. 12, 2002
Filed:
Jun. 24, 1996
Hideo Ohkuma, Chiba, JP;
Koji Mitsumori, Chiba, JP;
Sony Corporation, , JP;
Abstract
A biaxial actuator for an objective lens of an optical pickup that prevents the occurrence of tangential skew when the objective lens is moved in a focussing direction, and thereby improves optical performance. The actuator includes a lens holder that supports an objective lens , elastic supporting members each having one end fixed to the lens holder and the other end fixed to a fixed part The supporting members support the lens holder movably in a radial direction of a disc-form recording medium D and two directions intersecting orthogonally with this direction. The elastic supporting members are provided such that at least one pair on both sides of the objective lens are lined up in the optical axis direction of the objective lens. The pair of elastic supporting members have the spacing h1 of their fixing places on the lens holder side so set as to be narrower than the spacing h of their fixing places provided on the fixed part side. The elastic supporting members have expanding/contracting portions that elastically slightly expand and contract along the direction in which the elastic supporting members extend.