KR970002940A

KR970002940A - Piezoelectric Actuator Optical Pick-up Device

Info

Publication number: KR970002940A
Application number: KR1019950018505A
Authority: KR
Inventors: 박철웅
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1995-06-30
Filing date: 1995-06-30
Publication date: 1997-01-28

Abstract

본 발명은 압전액츄에이터형 광픽업장치에 관한 것으로, 정보기록매체에 레이저비임을 조사하고 그 정보기록 매체로부터 반사되는 광을 수광하여 정보의 독취가 가능하도록 하는 광픽업장치에서, 레이저비임을 발생하는 레이저광원과 광학계 및 수광소자가 일체화되어 내설된 광픽업유니트(20)와, 그 광픽업유니트(20)상에서 대물렌즈홀더(24)에 고정설치되어 상기 레이저광원에서 방사되는 레이저비임을 정보기록매체(디스크)상에 집광시키는 대물렌즈(22), 상기 광픽업유니트(20)내에서 상기 광픽업유니트(20)를 포커싱방향으로 압전 구동하는 포커싱 압전액츄에이터(26), 상기 광픽업유니트(20)에서 상기 광픽업유니트(20)를 트랙킹방향으로 압전구동하는 트랙킹 압전액츄에이터(36), 상기 포커싱 및 트랙킹 압전액츄에이터(26,36)를 구동하는 포커싱/트랙킹 구동수단을 갖추어 구성된 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piezoelectric actuator type optical pickup device, comprising: irradiating a laser beam to an information recording medium and receiving light reflected from the information recording medium to read information, thereby generating a laser beam. An information recording medium in which an optical pickup unit 20 in which a laser light source, an optical system and a light receiving element are integrated, and a laser beam fixed to an objective lens holder 24 on the optical pickup unit 20 are radiated from the laser light source. An objective lens 22 for condensing on the disc, a focusing piezoelectric actuator 26 for piezoelectrically driving the optical pickup unit 20 in a focusing direction in the optical pickup unit 20, and the optical pickup unit 20. Focusing / track driving piezoelectric actuators 36 for tracking the optical pickup unit 20 in the tracking direction, and for driving the focusing and tracking piezoelectric actuators 26 and 36 at It is configured and equipped with drive means.

Description

Piezoelectric Actuator Optical Pick-up Device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 본 발명의 바람직한 실시예에 따른 압전액츄에이터형 광픽업 장치를 나타낸 개략사시도, 제4도는 제3도에 도시된 본 발명의 바람직한 실시예에 따른 압전액츄에이터형 광픽업장치의 구동장치를 나타낸 블럭구성도이다.FIG. 3 is a schematic perspective view showing a piezoelectric actuator type optical pickup device according to a preferred embodiment of the present invention, and FIG. 4 is a diagram showing a driving device of the piezoelectric actuator type optical pickup device according to a preferred embodiment of the present invention shown in FIG. It is a block diagram.

Claims

An optical pickup apparatus for irradiating a laser beam to an information recording medium and receiving light reflected from the information recording medium to read information, wherein the laser light source generating the laser beam, the optical system, and the light receiving element are integrated. The optical pickup unit 20 and the objective lens 22 fixed to the objective lens holder 24 on the optical pickup unit 20 to condense the laser beam emitted from the laser light source onto the information recording medium (disk). And a focusing piezoelectric actuator 26 for piezoelectric driving the optical pickup unit 20 in the focusing direction in the optical pickup unit 20, and the optical pickup unit 20 in the tracking direction in the optical pickup unit 20. A piezoelectric actuator comprising a piezoelectric driving tracking piezoelectric actuator 36 and focusing / tracking driving means for driving the focusing and tracking piezoelectric actuators 26 and 36. Optical pickup actuator.

The focusing piezoelectric actuator (26) of claim 1, wherein the focusing piezoelectric actuator (26) includes a first electrode (28) having one end fixed to an inside of the main body of the optical pickup unit (20), and a second electrode (32) to which a focusing driving signal is applied. The piezoelectric member 30 and one end interposed between the first electrode and the second electrode and stretched by the potential applied to the first and second electrodes 28 and 32 are fixed to the second electrode and the other end thereof is fixed. Piezoelectric actuator type optical pickup device, characterized in that consisting of a focusing actuator member 34 of a laminated structure fixed in the vertical direction to the optical pickup unit (20).

The tracking piezoelectric actuator (36) of claim 1, wherein the tracking piezoelectric actuator (36) includes a first electrode (38) having one end fixed to an inside of the main body of the optical pickup unit (20), and a second electrode (42) to which a tracking driving signal is applied. The piezoelectric member 40 and one end interposed between the first electrode 38 and the second electrode 42 to expand and contract according to the potentials formed by the first and second electrodes 38 and 42. A piezoelectric actuator type optical pickup device, comprising a tracking actuator member (44) of a stacked structure, which is fixed to an electrode (42) and whose other end is fixed to the optical pickup unit (20) in a horizontal direction.

※ Note: The disclosure is based on the initial application.