US 5,208,703 AGranted

Apparatus for supporting optical system

AssigneeOlympus Optical Co., Ltd.

InventorsTetsuo Ikegame, Ichiro Ikari

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Abstract

An apparatus for supporting an objective lens of an optical head including a lens holder for holding the objective lens, a movable member for supporting the lens holder, and a supporting member for supporting the movable member movably in focusing and tracking directions. The supporting member includes four leaf springs and each of the leaf springs has a main beam portion, first and second end portions for securing the supporting member to the movable member and a stationary member and a flexure portion which is provided in the vicinity of the second end portion and includes a beam element which is aligned with the main beam portion, two first projecting elements which extend from the beam element in a direction perpendicular to a longitudinal direction of the main beam portion on respective sides of the beam element and two second projecting elements which extend in parallel with the beam element from the second end portion. The supporting member further includes a damping member applied on the main beam portion and flexure portion such that spaces formed between the first and second projecting elements and the beam element are completely filled with resilient material of the damping member.

Claims11

Dependent claims

An apparatus for supporting an optical system movably in at least one direction comprising:

a holding means for holding the optical system;
a supporting means for said holding means, said supporting means being made of resilient material and having a main beam portion which extends in a first direction, a first end portion providied at one end of said main beam portion for connecting the main beam portion to the holding means, a second end portion provided at the other end of said main beam portion for connecting said main beam portion to a stationary member, and a first flexure portion formed in the vicinity of at least one of said first and second end portions and including at least one first projecting element which extends from said main beam portion perpendicularly to said first direction, at least one projecting portion which extends from said main beam portion and a second projecting element extending from said projecting portion in said first direction, the second projecting element being spaced apart from said main beam portion and said first projecting element;
and
a damping member provided on at least said flexure portion such that the first and second projecting elements, the projecting portion and the main beam portion are interconnected by means of said damping member.

1 more element

Dependencies are inferred from the claim text.