KR20010046053A - Apparatus for moving an objective lens for optical pick-up - Google Patents

Apparatus for moving an objective lens for optical pick-up Download PDF

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Publication number
KR20010046053A
KR20010046053A KR1019990049645A KR19990049645A KR20010046053A KR 20010046053 A KR20010046053 A KR 20010046053A KR 1019990049645 A KR1019990049645 A KR 1019990049645A KR 19990049645 A KR19990049645 A KR 19990049645A KR 20010046053 A KR20010046053 A KR 20010046053A
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KR
South Korea
Prior art keywords
magnet
blade
tracking
tracking coil
objective lens
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KR1019990049645A
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Korean (ko)
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정기문
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이형도
삼성전기 주식회사
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Priority to KR1019990049645A priority Critical patent/KR20010046053A/en
Priority to JP2000170685A priority patent/JP2001143288A/en
Priority to CN00109277A priority patent/CN1296259A/en
Publication of KR20010046053A publication Critical patent/KR20010046053A/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1372—Lenses
    • G11B7/1374—Objective lenses
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0925—Electromechanical actuators for lens positioning
    • G11B7/093—Electromechanical actuators for lens positioning for focusing and tracking
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F2007/062—Details of terminals or connectors for electromagnets

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE: An objective lens driving apparatus of an optical pickup is provided to improve a tracking sensitivity by composing a plurality of magnet having an opposite polarity each other at both outside part making a tracking coil as center. CONSTITUTION: A blade(30) is installed to be able to move freely in a focusing and tracking direction through a support member at the holder(10), and an objective lens(40) is provided on the upper side of the blade(10), and an inserting groove is formed at both side, and then a tracking coil(50) is provided at four edges of both side. An external yoke(90) is installed parallel with the both side of the blade(30) and at a position to be apart from a designated distance. A first magnet(70) is adhered at the inside of the external yoke(90) separately so that the end of both side is located at a central part of the tracking coil(50) which is provided at the four edges of the blade(10). A second magnet(80) is adhered to be parallel with the external side of the tracking coil(50) at the end of both side of the first magnet(70), and has an opposite polarity against the first magnet(70).

Description

광픽업의 대물렌즈 구동장치{Apparatus for moving an objective lens for optical pick-up}Apparatus for moving an objective lens for optical pick-up}

본 발명은 광픽업에 관한 것으로서, 보다 상세하게는 디스크상에 빔을 스폿하는 대물렌즈 구동장치에 관한 것이다.The present invention relates to an optical pickup, and more particularly, to an objective lens driving apparatus for spotting a beam on a disc.

일반적으로 픽업은 디스크 플레이어에 채용되어 레이저 다이오드로부터 주사된 빔을 디스크로 주사하여 기록재생을 행하는 기능을 수행한다.In general, pickup is employed in a disc player to perform a function of scanning and reproducing a beam scanned from a laser diode to a disc.

이러한 픽업에 있어서, 특히 대물렌즈는 디스크와 픽업간의 거리에 따라 상,하 및 전,후 방향으로 유동되면서 정확한 스폿이 이루어지도록 하기 위하여 별도의 구동장치를 통해 포커싱(foucsing) 및 트랙킹(tracking) 방향으로 유동된다.In this pickup, in particular, the objective lens flows in the up, down, forward, and backward directions according to the distance between the disc and the pickup, and the focusing and tracking directions are provided through separate driving devices in order to achieve accurate spots. Flows into.

도 1에는 이러한 대물렌즈를 구동하기 위한 대물렌즈 구동장치의 일반적인 예를 나타내 보였다.1 shows a general example of an objective lens driving device for driving such an objective lens.

이는, 홀더(holder;1)를 구비하며, 이 홀더(holder;1)에는 지지부재(2)를 통해 블레이드(blade;3)가 포커싱(foucsing) 및 트랙킹(tracking) 방향으로 유동 가능하게 설치된다.It is provided with a holder 1, in which a blade 3 is installed to be movable in the direction of focusing and tracking through a support member 2. .

블레이드(3)에는 도시되지 않은 디스크상에 빔을 집속하여 스폿(spot)시키기 위한 대물렌즈(objective lens;4)가 위치되며, 양측 모서리부와 인접된 부위에는 트랙킹 코일(tracking coil;5)이 각각 부착된다.In the blade 3, an objective lens 4 for focusing and spotting a beam on a disk (not shown) is located, and a tracking coil 5 is provided at a portion adjacent to both edges. Each attached.

또한 블레이드(3)의 측면을 따라서는 도시되지는 않았지만 포커싱 코일(focusing coil)이 부착된다.Also along the side of the blade 3 a focusing coil is attached, although not shown.

한편, 홀더(1)에는 즉, 블레이드(3)의 좌,우 양측면과 소정거리 이격된 위치에는 외부 요크(外部yoke;6)가 대칭되도록 설치되며, 이 요크(6)의 각 내측면에는 자석(7)이 부착된다.On the other hand, the outer yoke 6 is symmetrically installed on the holder 1, that is, at positions spaced apart from the left and right sides of the blade 3 by a predetermined distance, and magnets are provided on each inner side of the yoke 6. (7) is attached.

또한 블레이드(3)의 양측면에는 소정폭으로 삽입홈(3a)이 형성되는 바, 이 삽입홈(3a)으로는 내부 요크(內部yoke;8)가 삽입된다.In addition, the insertion grooves 3a are formed on both sides of the blade 3 with a predetermined width, and the inner yoke 8 is inserted into the insertion grooves 3a.

이러한 구성을 갖는 대물렌즈 구동장치는, 자석(7)과 전류가 인가되는 트랙킹 코일(5) 및 포커싱 코일간에 발생되는 전자기력을 통해 지지부재(2)에 의해 지지된 블레이드(3)가 트랙킹 및 포커싱 방향으로 유동되면서 트랙킹 및 포커싱 에러를 방지하게 되는 것이다.In the objective lens driving device having such a configuration, the tracking and focusing of the blade 3 supported by the support member 2 through the electromagnetic force generated between the magnet 7 and the tracking coil 5 to which the current is applied and the focusing coil is performed. Direction to prevent tracking and focusing errors.

그러나 이와같은 일반적인 대물렌즈 구동장치에 있어서는, 포커싱 동작을 원활하게 수행되지만 트랙킹동작은 원활하게 수행되지 못하는 문제점을 내재하고 있다.However, in such a general objective driving device, the focusing operation is smoothly performed, but the tracking operation is not smoothly performed.

이와같은 문제점은, 도 2에 나타내 보인 바와 같이 자석(7)과 트랙킹 코일(5)간의 전자기력이 매우 미약하기 때문이다.This problem is because, as shown in Fig. 2, the electromagnetic force between the magnet 7 and the tracking coil 5 is very weak.

즉, 도 2에 나타내 보인 바와 같이, 자석(7)은 트랙킹 코일(5)의 대략 중간 부분까지 위치되어 있기 때문에 상호간에 발생되는 자기회로 또한 트랙킹 코일(5)의 중간 부분을 중심으로 형성되게 된다.That is, as shown in FIG. 2, since the magnet 7 is located up to approximately the middle portion of the tracking coil 5, mutually generated magnetic circuits are also formed around the middle portion of the tracking coil 5. .

따라서 트랙킹 코일(5)의 외측 부분에는 구동력이 발생되지 않게됨으로서 결과적으로는 트랙킹 코일(5)의 반만을 사용하는 구조이기 때문에 매우 약한 구동력을 얻게되기 때문이다.Therefore, the driving force is not generated in the outer portion of the tracking coil 5, and as a result, since the structure uses only half of the tracking coil 5, very weak driving force is obtained.

본 발명은 이와같은 종래의 문제점을 해결하기 위하여 창출된 것으로서, 트랙킹 코일의 전체면적에 걸쳐 자기회로를 구성할 수 있도록 함으로써 큰 구동력을 얻을 수 있어 트랙킹 방향으로 강한 구동력을 얻을 수 있는 광픽업의 대물렌즈 구동장치를 제공함에 그 목적이 있다.The present invention was created in order to solve such a conventional problem, the object of the optical pickup that can obtain a large driving force by making the magnetic circuit can be configured over the entire area of the tracking coil to obtain a strong driving force in the tracking direction It is an object to provide a lens driving device.

도 1은 일반적인 광픽업의 대물렌즈 구동장치를 보인 평면도,1 is a plan view showing an objective lens driving apparatus of a general optical pickup,

도 2는 종래 광픽업의 대물렌즈 구동장치에 있어서 트랙킹 코일과 자석사이에 발생되는 전기장의 상태를 보인 개념도,2 is a conceptual view showing a state of an electric field generated between a tracking coil and a magnet in the objective lens driving apparatus of the conventional optical pickup;

도 3은 본 발명에 따른 광픽업의 대물렌즈 구동장치를 나타낸 개략적 평면도,3 is a schematic plan view showing an objective lens driving apparatus for an optical pickup according to the present invention;

도 4는 자석과 트랙킹 코일간의 자기회로 상태를 보인 구성도.4 is a block diagram showing a magnetic circuit state between the magnet and the tracking coil.

〈도면의 주요부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>

10 : 홀더 20 : 지지부재10 holder 20 support member

30 : 블레이드 40 : 대물렌즈30: blade 40: objective lens

50 : 트랙킹 코일 60,90 : 내,외부 요크50: tracking coil 60,90: inner and outer yoke

70 : 제 1 자석 80 : 제 2 자석70: first magnet 80: second magnet

이와같은 목적을 달성하기 위하여 본 발명에 따른 광픽업의 대물렌즈 구동장치는, 홀더와; 상기 홀더상에 지지부재를 통해 포커싱 및 트랙킹 방향으로 유동 가능하게 설치되며, 상면에는 대물렌즈가 마련되고, 양측면에는 삽입홈이 형성되며, 양측 네 모서리부에는 트랙킹 코일이 각각 마련된 블레이드와; 상기 블레이드의 양측면과 소정거리 이격된 위치에 나란하게 설치되는 외부 요크와; 상기 블레이드의 네 모서리부에 마련된 트랙킹 코일의 중간 부분에 양단부가 위치되도록 상기 외부 요크의 내측면에 각각 부착되는 제 1 자석과; 상기 제 1 자석의 양측단부에 상기 트랙킹 코일의 외측면과 나란하도록 부착되며, 상기 제 1 자석과 반대되는 극성을 갖는 제 2 자석과; 상기 블레이드의 삽입홈에 각각 삽입되는 내부 요크;를 포함하여 된 것을 그 특징으로 한다.In order to achieve the above object, the objective lens driving apparatus of the optical pickup according to the present invention comprises a holder; A blade provided on the holder so as to be movable in a focusing and tracking direction through a supporting member, an objective lens provided on an upper surface thereof, an insertion groove formed on both sides thereof, and a tracking coil provided at four corners on both sides; An outer yoke installed side by side at a predetermined distance from both sides of the blade; First magnets respectively attached to inner surfaces of the outer yoke such that both ends thereof are positioned at an intermediate portion of the tracking coil provided at four corners of the blade; Second magnets attached to both end portions of the first magnet so as to be parallel to the outer surface of the tracking coil, and having a polarity opposite to the first magnet; And inner yokes respectively inserted into the insertion grooves of the blade.

이하 본 발명에 따른 광픽업의 대물렌즈 구동장치의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, exemplary embodiments of an objective lens driving apparatus for an optical pickup according to the present invention will be described in detail with reference to the accompanying drawings.

도 3은 본 발명에 따른 광픽업의 대물렌즈 구동장치를 나타낸 개략적 평면도이고, 도 4는 자석과 트랙킹 코일간의 자기회로 상태를 보인 구성도이다.3 is a schematic plan view showing an objective lens driving apparatus for an optical pickup according to the present invention, and FIG. 4 is a block diagram showing a magnetic circuit state between a magnet and a tracking coil.

이에 나타내 보인 바와 같이 본 발명에 따른 광픽업의 대물렌즈 구동장치는, 홀더(holder;10)를 구비하며, 이 홀더(holder;10)에는 지지부재(20)를 통해 블레이드(blade;30)가 포커싱(foucsing) 및 트랙킹(tracking) 방향으로 유동 가능하게 설치된다.As shown therein, the objective lens driving apparatus of the optical pickup according to the present invention includes a holder 10, and the holder 10 has a blade 30 through the support member 20. It is installed to be movable in the direction of focusing and tracking.

블레이드(30)에는 도시되지 않은 디스크상에 빔을 집속하여 스폿(spot)시키기 위한 대물렌즈(objective lens;40)가 위치되며, 양측 모서리부와 인접된 부위에는 트랙킹 코일(tracking coil;50)이 각각 부착된다.In the blade 30, an objective lens 40 for focusing and spotting a beam on a disk (not shown) is positioned. A tracking coil 50 is provided at a portion adjacent to both corners. Each attached.

또한 블레이드(30)의 측면을 따라서는 도시되지는 않았지만 포커싱 코일(focusing coil)이 부착된다.Also, although not shown along the side of the blade 30, a focusing coil is attached.

한편, 홀더(10)에는 즉, 블레이드(30)의 좌,우 양측면과 소정거리 이격된 위치에는 외부 요크(外部yoke;60)가 대칭되도록 설치되며, 이 외부 요크(60)의 각 내측면에는 제 1 자석(70)이 부착된다.On the other hand, in the holder 10, that is, the outer yoke (60) is installed to be symmetrical to the left and right sides of the blade 30 and a predetermined distance apart from each other, the inner side of each of the outer yoke (60) The first magnet 70 is attached.

이때 제 1 자석(70)은 그 양단부가 전술한 블레이드(30)의 좌,우 양측면에 부착된 트랙킹 코일(50)의 대략 중심부분과 대응되도록 위치된다.At this time, the first magnet 70 is positioned so that both ends thereof correspond to approximately the center portion of the tracking coil 50 attached to both left and right sides of the blade 30 described above.

이 제 1 자석(70)의 양끝단부에는 제 2 자석(80)이 각각 부착되는 바, 이 제 2 자석(80)은 트랙킹 코일(50)의 외측단과 대략 동일선상에 위치되도록 부착된다.The second magnets 80 are attached to both ends of the first magnets 70, respectively, and the second magnets 80 are attached to be substantially in line with the outer ends of the tracking coils 50.

또한 이 제 2 자석(80)은 제 1 자석(70)이 갖는 극성(極性)과 반대되는 극성을 갖는다.In addition, the second magnet 80 has a polarity opposite to that of the first magnet 70.

전술한 블레이드(30)의 양측면에는 소정폭으로 삽입홈(31)이 형성되며, 이 삽입홈(31)으로는 내부 요크(內部yoke;90)가 삽입된다.Inserting grooves 31 are formed on both sides of the blade 30 in a predetermined width, and the inner yoke 90 is inserted into the insertion grooves 31.

이와같이 구성된 본 발명에 따른 광픽업의 대물렌즈 구동장치는, 트랙킹 코일(50)이 전류가 인가되면 제 1 자석(70)과 제 2 자석(80) 사이에는 도 4에 나타내 보인 바와 같이 전기적인 자장이 형성되고 이를 통해 트랙킹 에러를 제거하게 된다.The objective lens driving apparatus of the optical pickup according to the present invention configured as described above has an electric magnetic field as shown in FIG. 4 between the first magnet 70 and the second magnet 80 when a current is applied to the tracking coil 50. Is formed thereby eliminating the tracking error.

즉, 제 1 자석(70)과 트랙킹 코일(50) 사이에 발생되는 전류의 방향에 따른 힘은 전류의 흐름이 일방향이기 때문에 일측으로만 힘이 작용된다.That is, the force according to the direction of the current generated between the first magnet 70 and the tracking coil 50 is applied to only one side because the current flows in one direction.

또한 제 2 자석(80)과 트랙킹 코일(50) 사이에서의 전류의 방향에 따른 힘의 방향은, 제 2 자석(80)이 제 1 자석(70)과 비교할 때 반대되는 극성을 갖고 있는 것이지만, 반하여 외측에 위치되어 있기 때문에 트랙킹 코일(50)에 흐르는 전류의 방향은 반대로 볼수 있다.In addition, the direction of the force in accordance with the direction of the current between the second magnet 80 and the tracking coil 50 is that the second magnet 80 has the opposite polarity as compared with the first magnet 70, On the contrary, since it is located on the outside, the direction of the current flowing through the tracking coil 50 can be viewed in the opposite direction.

따라서 제 1 자석(70)과 트랙킹 코일(50) 사이에서 형성된 힘의 방향과 제 2 자석(80) 및 트랙킹 코일(50) 사이에서 발생되는 힘의 방향은 일치되게된다.Therefore, the direction of the force formed between the first magnet 70 and the tracking coil 50 and the direction of the force generated between the second magnet 80 and the tracking coil 50 are made to match.

결과적으로 일측으로의 힘이 증대되는 효과를 얻게됨으로써 트랙킹량을 증대시키게 되어 트랙킹 감도를 향상시킬 수 있게되는 것이다.As a result, the effect of increasing the force to one side increases the tracking amount, thereby improving the tracking sensitivity.

상술한 바와 같이 본 발명에 따른 광픽업의 대물렌즈 구동장치에 의하면, 트랙킹 코일을 중심으로 하여 양 외측부에 서로 반대극성을 갖는 복수의 자석을 구성함으로써 트랙킹 감도를 향상시킬 수 있게된다.As described above, according to the objective lens driving apparatus of the optical pickup according to the present invention, the tracking sensitivity can be improved by forming a plurality of magnets having opposite polarities with respect to the outer side of the tracking coil.

이를 통해서는 고배속의 광 디스크 플레이어에 적절하게 대응할 수 있는등 다양한 방면에 적용 가능한 이점이 있다.Through this, there is an advantage that can be applied to various aspects, such as being able to properly respond to high-speed optical disk player.

Claims (1)

홀더와;With a holder; 상기 홀더상에 지지부재를 통해 포커싱 및 트랙킹 방향으로 유동 가능하게 설치되며, 상면에는 대물렌즈가 마련되고, 양측면에는 삽입홈이 형성되며, 양측 네 모서리부에는 트랙킹 코일이 각각 마련된 블레이드와;A blade provided on the holder so as to be movable in a focusing and tracking direction through a supporting member, an objective lens provided on an upper surface thereof, an insertion groove formed on both sides thereof, and a tracking coil provided at four corners on both sides; 상기 블레이드의 양측면과 소정거리 이격된 위치에 나란하게 설치되는 외부 요크와;An outer yoke installed side by side at a predetermined distance from both sides of the blade; 상기 블레이드의 네 모서리부에 마련된 트랙킹 코일의 중간 부분에 양단부가 위치되도록 상기 외부 요크의 내측면에 각각 부착되는 제 1 자석과;First magnets respectively attached to inner surfaces of the outer yoke such that both ends thereof are positioned at an intermediate portion of the tracking coil provided at four corners of the blade; 상기 제 1 자석의 양측단부에 상기 트랙킹 코일의 외측면과 나란하도록 부착되며, 상기 제 1 자석과 반대되는 극성을 갖는 제 2 자석과;Second magnets attached to both end portions of the first magnet so as to be parallel to the outer surface of the tracking coil, and having a polarity opposite to the first magnet; 상기 블레이드의 삽입홈에 각각 삽입되는 내부 요크;를 포함하여 된 것을 특징으로 하는 광픽업의 대물렌즈 구동장치.And an inner yoke respectively inserted into the insertion grooves of the blades.
KR1019990049645A 1999-11-10 1999-11-10 Apparatus for moving an objective lens for optical pick-up KR20010046053A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1019990049645A KR20010046053A (en) 1999-11-10 1999-11-10 Apparatus for moving an objective lens for optical pick-up
JP2000170685A JP2001143288A (en) 1999-11-10 2000-06-07 Objective lens driver for optical pickup
CN00109277A CN1296259A (en) 1999-11-10 2000-06-20 Objective lens driving device for laser optical head

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KR1019990049645A KR20010046053A (en) 1999-11-10 1999-11-10 Apparatus for moving an objective lens for optical pick-up

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7619951B2 (en) 2005-04-20 2009-11-17 Samsung Electronics Co., Ltd. Optical pickup actuator and optical recording and/or reproducing apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005158161A (en) * 2003-11-26 2005-06-16 Mitsumi Electric Co Ltd Objective lens driving apparatus
US8042130B2 (en) * 2006-01-22 2011-10-18 Mitsubishi Electric Corporation Optical driving device including a holder with a top face having a closed structure

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06349090A (en) * 1993-06-07 1994-12-22 Nec Corp Objective lens actuator
JPH08273176A (en) * 1995-03-30 1996-10-18 Nec Corp Objective lens actuator of optical head
JPH10116425A (en) * 1996-10-09 1998-05-06 Toshiba Corp Optical pickup device
JPH10334486A (en) * 1997-05-27 1998-12-18 Mitsumi Electric Co Ltd Optical pickup

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06349090A (en) * 1993-06-07 1994-12-22 Nec Corp Objective lens actuator
JPH08273176A (en) * 1995-03-30 1996-10-18 Nec Corp Objective lens actuator of optical head
JPH10116425A (en) * 1996-10-09 1998-05-06 Toshiba Corp Optical pickup device
JPH10334486A (en) * 1997-05-27 1998-12-18 Mitsumi Electric Co Ltd Optical pickup

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7619951B2 (en) 2005-04-20 2009-11-17 Samsung Electronics Co., Ltd. Optical pickup actuator and optical recording and/or reproducing apparatus

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JP2001143288A (en) 2001-05-25

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