KR0155102B1 - A double object-lens of hinge type optical pick-up actuator - Google Patents
A double object-lens of hinge type optical pick-up actuator Download PDFInfo
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- KR0155102B1 KR0155102B1 KR1019950022766A KR19950022766A KR0155102B1 KR 0155102 B1 KR0155102 B1 KR 0155102B1 KR 1019950022766 A KR1019950022766 A KR 1019950022766A KR 19950022766 A KR19950022766 A KR 19950022766A KR 0155102 B1 KR0155102 B1 KR 0155102B1
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- objective lens
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- lens holder
- optical pickup
- pickup actuator
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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
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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
- G11B7/08—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
- G11B7/0901—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 for track following only
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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
- G11B7/08—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
- G11B7/0908—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 for focusing only
Abstract
본 발명은 힌지타입 광픽업 액츄에이터의 이중대물렌즈에 관한것으로 서보시스템에서 전기적 신호를 인가 받아 안착된 디스크의 반사면에 촛점을 집속시키는 광픽업 액츄에이터에 있어서 상기 디스크의 반사면에 각기 다른 촛점을 집속시키는 제1대물렌즈(20) 및 제2대물렌즈(30)가 설치되도록 해주는 제1렌즈공(51) 및 제2렌즈공(52)이 형성된 대물렌즈홀더(50)와, 상기 대물렌즈홀더(50)의 외측 양면에 부착되어 대물렌즈홀더(50)의 포커싱 방향조정을 수행하는 포커싱조정코일(109)(110)과, 상기 포커싱조정코일(109)(110)의 외측면에 부착되어 대물렌즈 홀더(50)의 트랙킹 방향 조정을 수행하는 트랙킹 조정코일(111)(12)과 상기 대물렌즈홀더(50)에 설치된 포커싱조정코일(109)(110) 및 트랙킹조정코일(111)(112)이 유동가능하게 끼움 결합되는 내측요오크(107)(108)와 상기 대물렌즈홀더(50)에 설치된 포커싱조정코일(109)(110) 및 트랙킹 조정코일(111)(112)에 자화 반발력을 발생시키는 영구자석(105)(106)이 내면에 부착된 외측요오크(103)(104)와, 상기 내, 외측요오크(103)(104)(105)(106)가 설치되는 플레이트(40)로 구성된 것을 특징으로 하는 힌지타입 광픽업 액츄에이터의 이중대물렌즈 인바 힌지타입 광픽업 액츄에이터에 두가지 디스크 판을 모두 재생시키도록 해주는 것이다.The present invention relates to a dual objective lens of a hinge type optical pickup actuator. In an optical pickup actuator for focusing a reflective surface of a mounted disk by receiving an electrical signal from a servo system, a different focus is focused on the reflective surface of the disk. An objective lens holder 50 having a first lens hole 51 and a second lens hole 52 to allow the first objective lens 20 and the second objective lens 30 to be installed, and the objective lens holder ( Focusing adjustment coils 109 and 110 attached to the outer both sides of the lens 50 to adjust the focusing direction of the objective lens holder 50, and attached to the outer surfaces of the focusing adjustment coils 109 and 110, respectively. The tracking adjustment coils 111 and 12 for adjusting the tracking direction of the holder 50, the focusing adjustment coils 109 and 110 and the tracking adjustment coils 111 and 112 provided in the objective lens holder 50 are provided. Phase with inner yoke 107 and 108 that are fitably fitted The outer yoke (1) attached to the inner surface of the focusing adjustment coil (109) (110) and the tracking adjustment coil (111) (112) installed in the objective lens holder (50) is provided with permanent magnets (105) (106) for generating magnetization repulsion force. A dual objective lens of the hinge type optical pickup actuator, characterized in that consisting of a plate 40, 103, 104, and the inner and outer yoke 103, 104, 105, 106 is installed. This allows the optical pickup actuator to play both disc plates.
Description
제1도는 종래 한지타입 광픽업 액츄에이터의 사시도.1 is a perspective view of a conventional Hanji type optical pickup actuator.
제2도는 종래 힌지타입 광픽업 액츄에이터의 분해사시도.2 is an exploded perspective view of a conventional hinge type optical pickup actuator.
제3도는 본 발명에 따른 힌지타입 엑츄에이터의 사시도.3 is a perspective view of a hinge type actuator according to the present invention.
제4도는 본 발명에 따른 힌지타입 엑츄에이터의 분해 사시도.4 is an exploded perspective view of a hinge type actuator according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
20 : 제1대물렌즈 30 : 제2대물렌즈20: first objective lens 30: second objective lens
40 : 플레이트 41 : 제1레이져통과공40: plate 41: first laser through hole
42 : 제2레이져통과공 50 : 대물렌즈홀더42: second laser passing hole 50: objective lens holder
51 : 제1렌즈공 52 : 제2렌즈공51: first lens ball 52: second lens ball
본 발명은 힌지타입 광픽업 액츄에이터에 관한 것으로서, 특히 힌지타입 광픽업 액츄에이터의 대물렌즈홀더에 0.6 및 1.2미리미터 디스크판에 각각 다른 촛점을 맺혀주도록 하는 두 개의 대물렌즈를 설치시키므로써 사용자가 다른종류의 디스크판을 모두 재생시키도록 해주는 힌지타입 광픽업 액츄에이터의 이중대물렌즈에 관한 것이다.The present invention relates to a hinge type optical pick-up actuator, and in particular, the user has a different type by installing two objective lenses to focus differently on the 0.6 and 1.2 mm disc plates in the objective lens holder of the hinge type optical pick-up actuator. A dual objective lens of a hinge type optical pickup actuator that allows to play all of the disc boards.
일반적으로 광픽업 액츄에이터는 미니디스크플레이어(MDP), 콤팩트디스크플레이어(CDP)나 레이져디스크플레이어(LDP)와 같은 각종 광학디스크플레이어의 광기록 매체인 디스크의 수직하방에 설치되며 그 디스크의 래디얼 방향으로 직선 이동하면서 디스크상에서 원하는 트랙위치를 검출하고, 검출된 트랙위치에서는 디스크면상에 기록된 피트에레이져 광을 입사시킨다음 그 반사광을 광학계를 통하여 검출하고 이렇게 검출된 반사광을 신호로 변화시켜서 디스크면상의 기록내용을 재생하도록 하는 장치이다.In general, the optical pickup actuator is installed in the vertical direction of a disc, which is an optical recording medium of various optical disc players such as a mini disc player (MDP), a compact disc player (CDP), or a laser disc player (LDP), and in the radial direction of the disc. While detecting the desired track position on the disk while moving in a straight line, the pit laser light recorded on the disk surface is incident at the detected track position, and the reflected light is detected through the optical system. A device for reproducing the recorded content.
이러한 광픽업 액츄에이터에서는 포커싱 조정코일 및 트랙킹 조정코일이 설치되어 포커싱조정을 위하여 포커싱조정코일에 전류가 인가되면 액츄에이터의 대물렌즈가 액츄에이터를 기준으로 상하 방향 즉, 광축방향으로 움직임을 하고, 트래킹 조정코일에 전류가 인가되면 액츄에이터의 대물렌즈가 액츄에이터를 기준으로 하여 좌우방향 즉, 레디얼방향으로 움직임을 함으로써 트래킹 조정을 수행하는 것으로서, 일반적으로 광픽업 액츄에이터에는 와이어타입 액츄에이터와 힌지타입 액츄에이터가 사용되고 있는데 여기에서는 종래의 힌지타입 광픽업 액츄에이터의 구성에서는 제1도에서 보는 바와같이 액츄에이터의 소정위치에 레이저 광선이 통과하는 레이져통과공(1)이 형성되어 있는 플레이트(2)의 길이방향 양측면에 고정되어 있는 두 개의 외측요오크(3)(4)와, 상기 외측 요오크(3)(4)의 내측에 각각 설치되어 있는 두 개의 영구자석(5)(6)과, 상기 외측 요오크(3)(4)의 내측으로 소정간격 이격되어 상기 플레이트(2)에 고정설치되어 있는 두 개의 내측요오크(7)(8)와, 상기 내측 요오크(7)(8)에 각각 유동가능하게 끼워져 설치되게 코일이 다수회 감겨져 있는 포커싱 조정코일(9)(10)과, 상기 포커싱조정코일(9)(10)의 외측면에 설치되고 상기 영구자석(5)(6)과 소정간격 이격되어 있는 트래킹 조정코일(11)(12)과, 상기 플레이트(2)의 소정위치에 위치한 레이져통과공(1) 상방에 설치되어 디스크의 반사면에 촛점을 집속시키기 위한 대물렌즈(13)와, 상기 대물렌즈(13)와 동일축상에 설치되고 상기 대물렌즈(13)를 지지하며, 양 측면에 상기 포커싱조정코일(9)(10) 및 트래킹 조정코일(11)(12)이 부착되어 있는 대물렌즈홀더(14)와, 상기 대물렌즈홀더(14)의 광축방향 및 래디얼 방향으로의 요동을 지지해줌과 동시에 외부로 부터의 충격작용시 그 진동을 감쇄하는 서스팬션(15)으로 이루어진 구조이다.In such an optical pickup actuator, when a focusing adjustment coil and a tracking adjustment coil are installed, and a current is applied to the focusing adjustment coil for focusing adjustment, the objective lens of the actuator moves in the vertical direction, that is, in the optical axis direction, based on the actuator, and the tracking adjustment coil. When the current is applied to the actuator, the objective lens of the actuator moves to the left or right direction, that is, the radial direction with respect to the actuator. Tracking adjustment is performed. Generally, a wire type actuator and a hinge type actuator are used for the optical pickup actuator. In the configuration of a conventional hinge type optical pickup actuator, as shown in FIG. 1, the two fixed side surfaces of the plate 2 having the laser passing holes 1 through which the laser beam passes are formed at a predetermined position of the actuator. More Of the yoke (3) (4), the two permanent magnets (5) (6) which are provided inside the outer yoke (3) (4), respectively, and the outer yoke (3) (4) A plurality of coils are installed so as to be movable to each of the two inner yoke (7) (8) and the inner yoke (7) (8), which are fixed to the plate (2) and spaced apart inwardly. Focusing adjustment coils 9 and 10 wound around each other, and tracking adjustment coils 11 provided on the outer surface of the focusing adjustment coils 9 and 10 and spaced apart from the permanent magnets 5 and 6 by a predetermined distance. 12, an objective lens 13 installed above the laser passing hole 1 located at a predetermined position of the plate 2 to focus the focus on the reflective surface of the disc, and the objective lens 13 The objective lens hole is installed on the same axis and supports the objective lens 13, and the focusing adjustment coils 9 and 10 and the tracking adjustment coils 11 and 12 are attached to both sides. A structure consisting of a 14, a suspension 15 for attenuating the shock vibration during operation of the optical axis direction and the motion in the radial direction of the objective lens holder 14 supporting haejum and at the same time from the outside.
이와같이 이루어진 종래의 광 픽업 액츄에이터에서는 레이져 다이오드로부터 발생된 레이저 빔의 디스크 기록피트에 입사되고, 디스크 기록피트로부터 반사된 레이져빔이 광학계상의 광검출장치(Photo Detecter)로 인가되어 기록피트상에 기록된 데이터를 읽어 내게 된다. 그리고, 광학계상의 광 검출장치(Photo Detector)에서 레이져 빔의 기록피트에서의 포커싱 및 트랙킹 상태를 검출한 결과 교정이 필요한 경우에 서보시스템은 트래킹 조정코일 및 포커싱 조정코일이 전류를 인가하게 된다. 트래킹 조정코일 및 포커싱조정코일에 전류가 인가되면 코일이 전자석화 되며 외측 요오크(3)(4)의 내측면에 각각 장착된 영구자석(5)(6)과의 반발력으로 인하여 대물렌즈홀더(14)가 포커싱 조정을 위하여 광축방향으로 움직임을하고, 트랙킹 조정을 위하여 대물렌즈 홀더(14)가 래디얼방향으로 움직이게 된다.In the conventional optical pickup actuator made in this way, the laser beam incident on the laser beam generated from the laser diode is incident on the optical pickup actuator, and the laser beam reflected from the disk recording foot is applied to a photo detector on an optical system and recorded on the recording foot. The data will be read. The tracking system and the focusing adjustment coil apply a current when the calibration adjustment is necessary as a result of detecting the focusing and tracking states at the recording feet of the laser beam by a photo detector on the optical system. When a current is applied to the tracking adjustment coil and the focusing adjustment coil, the coil is electromagnetized and the objective lens holder is caused by the repulsive force with the permanent magnets 5 and 6 mounted on the inner surfaces of the outer yoke 3 and 4, respectively. 14 moves in the optical axis direction for focusing adjustment, and the objective lens holder 14 moves in the radial direction for tracking adjustment.
와이어타입 광픽업 액츄에이터의 경우에 두가지 종류의 디시크를, 예를들면 0.6㎜와 1.2㎜디스크를 동시에 포커싱 할수 있는 듀얼 포커스 타입(Dual focus type) 대물렌즈가 사용 되므로써 사용자가 디스크를 재생하는데 있어서 선택의 폭을 넓혀주고 있다.In the case of a wire-type optical pickup actuator, two types of discs, for example, a dual focus type objective lens capable of simultaneously focusing a 0.6 mm and a 1.2 mm disc, are used for the user to select a disc for playing the disc. To expand the width of.
즉, 대물렌즈를 이중구조로 제작하여 0.6㎜, 1.2㎜디스크판에 모두 촛점을 맺을 수 있도록 하므로써 어느한쪽 종류의 디스크밖에 사용하지 못하는 불합리를 해소하도록 하였다.In other words, the objective lens is manufactured in a dual structure to focus on both 0.6 mm and 1.2 mm disc plates, thereby eliminating irrationality that only one type of disc can be used.
그러나 상기한 듀얼포커스 방식의 광픽업 액츄에이터는 대물렌즈를 이중구조로 제작하여서 0.6㎜와 1.2㎜ 디스크판에 동시에 촛점을 맺히도록 구성된 것으로서 대물렌즈를 이중구조로 제작하기가 어렵고 구성부품의 구성배열을 정확하게 배열하기가 어려우며 광평행도를 정밀하게 유지하지 못하는 문제점이 있었다.However, the dual focus optical pickup actuator is configured to simultaneously focus on 0.6 mm and 1.2 mm disk plates by making the objective lens in a dual structure, making it difficult to manufacture the objective lens in a dual structure, and the arrangement of components It was difficult to arrange correctly and there was a problem in not maintaining the optical parallelism precisely.
또한 상기 제1도내지 제2도에서 도시한 대물렌즈가 하나인 힌지타입 광픽업액츄에이터 0.6㎜와, 1.2㎜ 디스크판중에 선택적으로 하나의 디스크판 밖에 재생하지 못하므로 선택의 폭이 작은 문제점이 있었다.In addition, since only one disc plate of the hinge type optical pickup actuator having a single objective lens shown in FIGS. .
본 발명은 이러한 점을 감안하여 안출한 것으로서, 힌지타입 광픽업 액츄에이터의 대물렌즈 홀더에 두개의 렌즈공을 형성하고, 그 렌즈공상에 서로다른 곡률을 갖는 제1 제2 대물렌즈를 설치하여서 종류가 각각다른 0.6㎜와 1.2㎜ 디스크판을 모두 재생하도록 하는 것이 목적이다.SUMMARY OF THE INVENTION The present invention has been made in view of the above, and has two lens holes formed in an objective lens holder of a hinge type optical pickup actuator, and a first second objective lens having different curvatures is installed on the lens holes. The purpose is to reproduce both different 0.6 mm and 1.2 mm disc plates.
이러한 목적은 서보시스템에서 전기적 신호를 인가 받아 안착된 디스크의 반사면에 촛점을 집속시키는 광픽업 액츄에이터에 있어서 상기 디스크의 반사면에 각기다른 촛점을 집속시키는 제1대물렌즈 및 제2대물렌즈가 설치되도록 해주는 제1렌즈공 및 제2렌즈공이 형성된 대물렌즈홀더와, 상기 대물렌즈 홀더의 외측양면에 부착되어 대물렌즈홀더의 포커싱 방향 조정을 수행하는 포커싱조정코일과, 상기 포커싱 조정코일의 외측면에 부착되어 대물렌즈홀더의 트랙킹 방향 조정을 수행하는 트랙킹 조정코일와, 상기 대물렌즈홀더에 설치된 포커싱조정코일 및 트랙킹조정코일이 유동가능하게 끼움결합되는 내측요오크와 상기 대물렌즈 홀더에 설치된 포커싱조정코일에 자화반발력을 발생시키는 영구자석이 내면에 부착된 외측요오크와, 상기 내, 외측요오크가 설치되는 플레이트로 구성된 힌지타입 광픽업 액츄에이터의 이중 대물렌즈를 제공하므로써 달성된다.The objective is to install a first objective lens and a second objective lens for focusing different focus on the reflective surface of the disk in the optical pickup actuator for focusing on the reflective surface of the disc seated by receiving an electrical signal from the servo system. An objective lens holder having a first lens hole and a second lens hole formed thereon, a focusing adjustment coil attached to both outer surfaces of the objective lens holder to adjust a focusing direction of the objective lens holder, and an outer surface of the focusing adjustment coil. A tracking adjustment coil attached to the tracking adjustment coil for adjusting the tracking direction of the objective lens holder, a focusing adjustment coil installed in the objective lens holder, and an inner yoke in which the tracking adjustment coil is movably fitted, and a focusing adjustment coil installed in the objective lens holder. The outer yoke having the permanent magnet generating magnetic repulsion force attached to the inner surface, and the inner and outer sides This is achieved by providing a dual objective of a hinge type optical pickup actuator consisting of a plate on which yoke is installed.
이하, 첨부도면에 의거하여 본 발명의 구성을 상세히 살펴보도록한다.Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.
먼저, 제3도 및 제4도에 도시된 바와같이 본 발명의 구성은 서보시스템에서 전기적 신호를 인가 받아 안착된 디스크의 반사면에 촛점을 접속시키는 광픽업 액츄에이터에 있어서, 상기 디스크의 반사면에 각기 다른 촛점을 집속시키는 제1대물렌즈(20) 및 제2대물렌즈(30)와, 상기 제1대물렌즈(20) 및 제2대물렌즈(30)가 설치되도록 해주는 제1렌즈공(51) 및 제2렌즈공(52)이 형성된 대물렌즈홀더(50)와, 상기 대물렌즈홀더(50)의 외측 양면에 부착되어 대물렌즈홀더(50)의 포커싱방향조정을 수행하는 포커싱 조정코일(109)(110)과, 상기 포커싱조정코일(109)(110)의 외측면에 부착되어 대물렌즈홀더(50)의 트랙킹방향 조정을 수행하는 트랙킹 조정코일(111)(112)와, 상기 대물렌즈홀더(50)에 설치된 포커싱조정코일(111)(112)이 유동가능하게 끼움 결합되는 내측 요오크(107)(108)와, 상기 대물렌즈홀더(50)에 설치된 포커싱 조정코일(109)(110) 및 트래킹조정코일(111)(112)에 자화 반발력을 발생시키는 영구자석(105)(106)이 내면에 부착된 외측요오크(103)(104)와, 상기 내, 외측요오크(103)(104)(105)(106)가 설치되는 플레이트(40)로 구성된 것이다.First, as shown in FIG. 3 and FIG. 4, the configuration of the present invention is an optical pickup actuator which connects a focus to a reflecting surface of a seated disk by receiving an electrical signal from a servo system. The first objective lens 20 and the second objective lens 30 for focusing different focal points, and the first lens hole 51 for allowing the first objective lens 20 and the second objective lens 30 to be installed. And a focusing adjustment coil 109 attached to both sides of the objective lens holder 50 having the second lens hole 52 and the outer lens holder 50 to adjust the focusing direction of the objective lens holder 50. (110), tracking adjustment coils (111, 112) attached to the outer surface of the focusing adjustment coils (109, 110) to perform the tracking direction adjustment of the objective lens holder (50), and the objective lens holder ( Focusing adjustment coils (111, 112) installed in the 50, the inner yoke (107, 108) is fitted to be fluidly coupled The outer yaw attached to the inner surface of the permanent magnets 105 and 106 generating magnetization repulsive force on the focusing adjustment coils 109 and 110 and the tracking adjustment coils 111 and 112 installed in the objective lens holder 50. The oak 103, 104, and the inner and outer yoke 103, 104, 105, 106 is provided with a plate 40 is provided.
그리고, 상기 제1대물렌즈(20) 및 제2대물렌즈(30)는 각각 0.6㎜와 1.2㎜ 디스크중에 하나의 디스크에 선택적으로 촛점을 집속시키도록 구성된 것이다.The first objective lens 20 and the second objective lens 30 are configured to selectively focus on one of the 0.6 mm and 1.2 mm disks, respectively.
또한 상기 플레이트(40)에 레이저가 통과하는 제1레이져통과공(41) 및 제2레이져통과공(42)이 각각 형성되는 것이다.In addition, the first laser through hole 41 and the second laser through hole 42 through which the laser passes are formed in the plate 40, respectively.
이하, 본 발명의 작용 효과를 상세히 설명하도록 한다.Hereinafter, the effect of the present invention will be described in detail.
먼저 상기 제1대물렌즈(20)를 0.6㎜ 디스크판에 광을 집속시키도록 하고, 상기 제2대물렌즈(30)를 1.2디스크판에 레이져 광을 집속시키도록 선택하면서 0.6㎜디스크를 컴팩트 디스크플레이어에 장착시킨후 버튼을 누르게 되면 레이저 다이오드로부터 발생된 레이저 빔이 디스크의 기록피트에 입사되고, 디스크의 기록피트로 부터 반사된 레이저빔이 광학계상의 광검출장치(Photo Detector)로 인가되어 기록피트상에 기록된 데이트를 읽어내게 된다.First, the first objective lens 20 is focused on a 0.6 mm disk, and the second objective lens 30 is selected to focus laser light on a 1.2 disk. When the button is pressed, the laser beam generated from the laser diode is incident on the recording feet of the disc, and the laser beam reflected from the recording feet of the disc is applied to the photo detector on the optical system to form the recording feet. The date recorded in is read.
그리고, 광학계상의 광검출장치(Photo Detector)에서 레이저빔의 기록피트에서의 포커싱 및 트랙킹상태를 검출한 결과 교정이 필요한 경우에 서보시스템은 트래킹 조정코일 및 포커싱 조정코일이 전류를 인가하게 된다.The tracking system and the focusing adjustment coil apply a current when the calibration adjustment is necessary as a result of detecting the focusing and tracking states in the recording feet of the laser beam by the photo detector on the optical system.
트랙킹조정코일 및 포커싱조정코일에 전류가 인가되면 코일이 전자석화 되면 외측요오크(103)(104)의 내측면에 각각 장치된 영구자석(105)(106)과의 반발력으로 인하여 대물렌즈홀더(50)가 포커싱 조정을 위하여 광축방향으로 움직임을 하고, 트랙킹 조정을 위하여 대물렌즈홀더(50)가 레디얼 방향으로 움직이게 된다.When current is applied to the tracking adjustment coil and the focusing adjustment coil, when the coil is electromagnetized, the objective lens holder is caused by the repulsive force with the permanent magnets 105 and 106 mounted on the inner surfaces of the outer yoke 103 and 104, respectively. 50 moves in the optical axis direction for focusing adjustment, and the objective lens holder 50 moves in the radial direction for tracking adjustment.
그리고, 미도시된 레이저다이오드를 통한 레이저 광이 플레이트(40)의 제1레이져 통과공(41)을 통해서 제1대물렌즈(30)를 지나 0.6㎜디스크판의 피트에 집속이 되면서 필요한 음성 및 영상신호를 재생시키게 된다.Then, the laser light through the laser diode (not shown) is focused on the pit of the 0.6 mm disk by passing through the first objective lens 30 through the first laser through hole 41 of the plate 40 to the pit of the 0.6 mm disk. Will play the signal.
또한 1.2㎜디스크를 CDP내에 장착시키게 되면 상기한 과정과 동일한 과정을 거쳐서 레이저광이 제2레이져 통과공(42)을 통해서 제2대물렌즈(30)를 지나 1.2㎜디스크판의 피트에 집속이 되면서 필요한 신호를 재생시키게 되는 것으로서 결국에는 하나의 광픽업 액츄에이터로 두가지 종류의 디스크판을 모두 재생시킬 수가 있는 것이다.In addition, when the 1.2 mm disc is mounted in the CDP, the laser beam is focused on the pits of the 1.2 mm disc plate through the second objective lens 30 through the second laser through hole 42 through the same process as described above. By reproducing the necessary signals, one type of optical pickup actuator can eventually reproduce both types of discs.
따라서 힌지타입 광픽업 액츄에이터의 대물렌즈홀더에 각각 디스크에 다른 촛점을 맺히도록 하는 대물렌즈를 두개 설치하므로써 각각 다른 0.6㎜와 1.2㎜의 디스크판을 신속, 정확하게 재생시키며 구성부품의 배열이 비교적 간단하고, 광 평행도를 정확하게 유지하도록 해주는 매우 유용한 발명인 것이다.Therefore, by installing two objective lenses in the hinge type optical pickup actuator, each of which has a different focus on the disk, the different 0.6 mm and 1.2 mm disc plates can be quickly and accurately reproduced, and the arrangement of components is relatively simple. It is a very useful invention that allows to maintain the optical parallelism accurately.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950022766A KR0155102B1 (en) | 1995-07-28 | 1995-07-28 | A double object-lens of hinge type optical pick-up actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950022766A KR0155102B1 (en) | 1995-07-28 | 1995-07-28 | A double object-lens of hinge type optical pick-up actuator |
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| Publication Number | Publication Date |
|---|---|
| KR970007889A KR970007889A (en) | 1997-02-21 |
| KR0155102B1 true KR0155102B1 (en) | 1998-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019950022766A KR0155102B1 (en) | 1995-07-28 | 1995-07-28 | A double object-lens of hinge type optical pick-up actuator |
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| Country | Link |
|---|---|
| KR (1) | KR0155102B1 (en) |
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1995
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