KR950034121A - Optical pickup - Google Patents

Optical pickup Download PDF

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Publication number
KR950034121A
KR950034121A KR1019940010694A KR19940010694A KR950034121A KR 950034121 A KR950034121 A KR 950034121A KR 1019940010694 A KR1019940010694 A KR 1019940010694A KR 19940010694 A KR19940010694 A KR 19940010694A KR 950034121 A KR950034121 A KR 950034121A
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KR
South Korea
Prior art keywords
objective lens
driving means
driving
holder portion
lens holder
Prior art date
Application number
KR1019940010694A
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Korean (ko)
Inventor
정명진
Original Assignee
김주용
현대전자산업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 김주용, 현대전자산업 주식회사 filed Critical 김주용
Priority to KR1019940010694A priority Critical patent/KR950034121A/en
Publication of KR950034121A publication Critical patent/KR950034121A/en

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Abstract

본 발명은 광디스크장치에 있어서 압전소자를 이용하여 대물렌즈를 구동하는 광학식 픽업장치에 관한 것이다. 이를 위하여 대물렌즈가 부착되어 있는 대물렌즈 홀더부와, 적응형 압전소자로 구성되며 상기 대물렌즈 홀더부를 포커스방향으로 구동하기 위한 제1구동수단과, 자기회로로 구성되며 상기 대물렌즈 홀더부를 트랙킹 방향으로 구동하기 위한 제2구동수단을 구비하여 상기 제1구동수단과 제2구동수단에 의해 상기 대물렌즈 홀더부가 디스크상에서의 광축과 평행한 방향(포커스 방향) 및 수직한 방향(트랙킹 방향)으로 변위가능함을 특징으로 한다. 따라서 대물렌즈의 포커스방향 구동수단인 보이스 코일 모터를 사용하지 않고 적응형 압전소자를 사용함으로써 구동부의 소형화 및 경량화, 구조의 단순화로 인한 조립비용을 절감할 수 있는 효과가 있다.The present invention relates to an optical pickup apparatus for driving an objective lens using a piezoelectric element in an optical disk apparatus. To this end, an objective lens holder portion to which an objective lens is attached, an adaptive piezoelectric element, first driving means for driving the objective lens holder portion in a focusing direction, and a magnetic circuit are included. And a second driving means for driving in the first direction, and the objective lens holder portion is displaced in a direction parallel to the optical axis (focus direction) and in a vertical direction (tracking direction) by the first driving means and the second driving means. It is characterized by possible. Therefore, by using the adaptive piezoelectric element without using the voice coil motor which is the focus direction driving means of the objective lens, the assembly cost can be reduced due to the miniaturization and light weight of the driving unit, and the simplification of the structure.

Description

광학식 픽업장치Optical pickup

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

제3도는 본 발명에 따른 광학식 픽업장치를 도시한 사시도, 제4도는 본 발명에 따른 광학식 픽업장치를 도시한 분해도, 제5도는 본 발명에 따른 적응형 압전소자의 동작도.3 is a perspective view showing an optical pickup device according to the present invention, Figure 4 is an exploded view showing an optical pickup device according to the present invention, Figure 5 is an operation of the adaptive piezoelectric element according to the present invention.

Claims (7)

광디스크장치에 있어서, 대물렌즈(1)가 부착되어 있는 대물렌즈 홀더부(2)와; 적응형 압전소자로 구성되며 상기 대물렌즈 홀더부(2)를 포커스방향으로 구동하기 위한 제1구동수단(3)과; 자기회로로 구성되며 상기 대물렌즈 홀더부(2)를 트랙킹방향으로 구동하기 위한 제2구동수단(6,7,8,9)을 구비하여, 상기 제1구동수단(3)과 제2구동수단(6,7,8,9)에 의해 상기 대물렌즈 홀더부(2)가 디스크상에서의 광축과 평행한 방향(포커스 방향) 및 수직한 방향(트랙킹 방향)으로 변위가능함을 특징으로 하는 광학식 픽업장치.An optical disk apparatus, comprising: an objective lens holder portion (2) to which an objective lens (1) is attached; First driving means (3) composed of an adaptive piezoelectric element for driving the objective lens holder portion (2) in a focus direction; It is composed of a magnetic circuit and has second driving means (6,7,8,9) for driving the objective lens holder portion (2) in the tracking direction, so that the first driving means (3) and the second driving means (6,7,8,9), wherein the objective lens holder portion 2 is displaceable in a direction parallel to the optical axis on the disc (focus direction) and in a vertical direction (tracking direction). . 제1항에 있어서, 상기 제1구동수단(3)의 적응형 압전소자는 상기 대물렌즈 홀더부(2)와 캐리지(4)의 베이스상에 부착되어 에러신호 검출부(230)에서 발생하는 신호에 의하여 동작함을 특징으로 하는 광학식 픽업장치.The method according to claim 1, wherein the adaptive piezoelectric element of the first driving means (3) is attached on the base of the objective lens holder portion (2) and the carriage (4) to a signal generated by the error signal detection portion (230). Optical pickup device characterized in that the operation by. 제1항에 있어서, 상기 제2구동수단(6,7,8,9)은 미동 트랙킹동작과, 조동 트랙킹동작을 단일의 트랙킹동작으로 통합하여 동작함을 특징으로 하는 광학식 픽업장치.2. The optical pickup apparatus according to claim 1, wherein the second driving means (6, 7, 8, 9) operate by integrating the fine tracking operation and the coarse tracking operation into a single tracking operation. 제1항에 있어서, 상기 제2구동수단(6,7,8,9)의 자기회로는 구동 코일(6)과 마그네트(7)와 요크(8)와 레일(9)로 구성됨을 특징으로 하는 광학식 픽업장치.2. The magnetic circuit of the second driving means (6, 7, 8, 9) is characterized in that it comprises a drive coil (6), a magnet (7), a yoke (8) and a rail (9). Optical pickup. 제4항에 있어서, 상기 마크네트(7)와 요크(8)는 시스템베이스에 부착됨을 특징으로 하는 광학식 픽업장치.5. Optical pickup device according to claim 4, wherein the mark net (7) and yoke (8) are attached to a system base. 제4항에 있어서, 상기 레일(9)은 상기 캐리지(4) 옆면의 구멍에 끼워져 상기 캐리지(4)가 상기 레일(9)을 따라 이동하도록 구성됨을 특징으로 하는 광학식 픽업장치.5. Optical pickup device according to claim 4, characterized in that the rail (9) is fitted in a hole in the side of the carriage (4) so that the carriage (4) moves along the rail (9). 제6항에 있어서, 상기 캐리지(4)는 엔지니어링 플라스틱으로 사출함을 특징으로 하는 광학식 픽업장치.7. Optical pick-up device according to claim 6, characterized in that the carriage (4) is injected into engineering plastic. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940010694A 1994-05-16 1994-05-16 Optical pickup KR950034121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940010694A KR950034121A (en) 1994-05-16 1994-05-16 Optical pickup

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Application Number Priority Date Filing Date Title
KR1019940010694A KR950034121A (en) 1994-05-16 1994-05-16 Optical pickup

Publications (1)

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KR950034121A true KR950034121A (en) 1995-12-26

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020028628A (en) * 2000-10-11 2002-04-17 박영필 Piezoelectric Actuator For Optical Pick-up Device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020028628A (en) * 2000-10-11 2002-04-17 박영필 Piezoelectric Actuator For Optical Pick-up Device

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