JPH0276318U

JPH0276318U -

Info

Publication number: JPH0276318U
Application number: JP9882189U
Authority: JP
Priority date: 1988-08-31
Filing date: 1989-08-24
Publication date: 1990-06-12
Anticipated expiration: 2004-08-24
Also published as: JPH0725853Y2

Description

[Brief explanation of drawings]

第１図ないし第３図は本考案に係わる対物レン
ズの傾き調整装置の第１実施例を示し、第１図は
第２図の―線に沿う断面図、第２図はその傾
き調整装置の平面図、第３図は光デイスクに対す
る対物レンズの傾き調整方向の説明図、第４図な
いし第７図は本考案に係わる対物レンズ傾き調整
装置の第２実施例を示し、第４図は第５図の′
―′線に沿う断面図、第５図は対物レンズ位置
検出装置を搭載した対物レンズの傾き調整装置の
平面図、第６図はアクチユエータベースのテーパ
部と光学ユニツトの受け部とを拡大して示す部分
断面図、第７図はその第２実施例に係わるアクチ
ユエータベースの底面図、第８図は第９図に示す
対物レンズの傾き調整装置の要部構成を示す分解
斜視図、第９図は従来の対物レンズの傾き調整装
置の断面図、である。２０……光学ユニツト部、２１……光デイスク
、２４……板バネ、２５……アクチユエータベー
ス、２６……可動体、３７……受け部、４１……
テーパー面、４２，４３……傾き調整ネジ、４４
……固定ネジ、４５……対物レンズ、５０……対
物レンズ位置検出装置、５３……ＬＥＤ。 1 to 3 show a first embodiment of the objective lens tilt adjusting device according to the present invention, FIG. 1 is a sectional view taken along the line - in FIG. 2, and FIG. 2 is a sectional view of the tilt adjusting device. 3 is an explanatory diagram of the direction of adjusting the tilt of the objective lens with respect to the optical disk, FIGS. 4 to 7 show a second embodiment of the objective lens tilt adjusting device according to the present invention, and FIG. ' in Figure 5
5 is a plan view of the objective lens tilt adjustment device equipped with an objective lens position detection device, and FIG. 6 is an enlarged view of the taper part of the actuator base and the receiving part of the optical unit. FIG. 7 is a bottom view of the actuator base according to the second embodiment, FIG. 8 is an exploded perspective view showing the main part configuration of the objective lens tilt adjustment device shown in FIG. 9, and FIG. FIG. 9 is a sectional view of a conventional objective lens tilt adjustment device. 20... Optical unit part, 21... Optical disk, 24... Leaf spring, 25... Actuator base, 26... Movable body, 37... Receiving part, 41...
Tapered surface, 42, 43...Tilt adjustment screw, 44
... Fixing screw, 45 ... Objective lens, 50 ... Objective lens position detection device, 53 ... LED.

Claims

[Scope of utility model registration request]

A movable body having an objective lens is supported by an actuator base provided between an optical disk and an optical unit section so as to be driven in a tracking direction and a focusing direction of the optical disk, and the actuator base has a movable body having an objective lens. forming a tapered surface that comes into contact with a receiving portion formed on the optical unit portion on the surface opposite to the optical unit portion;
A leaf spring that biases the actuator base toward the optical unit section is attached to the optical unit section, and the actuator base is pressed against the optical unit section. The objective lens is held in the optical unit part while being adjusted using two tilt adjusting screws for adjusting the tilt of the objective lens with respect to the optical disk in the tangential direction and the radial direction, and after adjusting the tilt with respect to the optical disk, the objective lens is adjusted. A tilt adjusting device for an objective lens, characterized in that the yuator base is fixed to the optical unit section using one fixing screw that cooperates with the two tilt adjusting screws.