KR100294236B1 - Optical driving device using near field phenomenon - Google Patents
Optical driving device using near field phenomenon Download PDFInfo
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- KR100294236B1 KR100294236B1 KR1019980020225A KR19980020225A KR100294236B1 KR 100294236 B1 KR100294236 B1 KR 100294236B1 KR 1019980020225 A KR1019980020225 A KR 1019980020225A KR 19980020225 A KR19980020225 A KR 19980020225A KR 100294236 B1 KR100294236 B1 KR 100294236B1
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- optical
- optical system
- light
- head
- transmission
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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
- G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
- G11B7/003—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with webs, filaments or wires, e.g. belts, spooled tapes or films of quasi-infinite extent
- G11B7/0031—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with webs, filaments or wires, e.g. belts, spooled tapes or films of quasi-infinite extent using a rotating head, e.g. helicoidal recording
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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
- G11B7/0925—Electromechanical actuators for lens positioning
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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
- G11B7/095—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble
- G11B7/0956—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for tilt, skew, warp or inclination of the disc, i.e. maintain the optical axis at right angles to the disc
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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
- G11B7/1362—Mirrors
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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
- G11B7/12—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
- G11B7/1387—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector using the near-field effect
Abstract
본 발명은 니어필드(near field)현상을 이용하여 광을 광학렌즈가 있는 헤드부까지 송출하기위한 광구동장치에 관한 것으로, 이 광구동장치는 고정된 베이스(base)상에 위치하여 광을 송출하고 입사되는 광을 수광하는 송/수광부광학계; 상기 송/수광부광학계로부터 출사되는 광의 광로를 조정하는 광로조정수단; 상기 헤드부의 구동을 회전형으로 하며, 상기 헤드부가 일정방향을 유지하도록하는 적어도 둘 이상의 회전구동부; 및 상기 헤드부와 회전구동부를 연결하며, 상기 송/수광부광학계로부터 광로조정수단을 통과한 광의 진행방향이 상기 광학렌즈로 향하도록 하는 헤드연결부를 구비한다. 본 발명에 따른 광구동장치를 이용하면, 회전구동부의 회전속도가 빠르게 되고, 데이터액세스시간이 줄어든다. 또한, 디스크회전시의 반경방향과 슬라이더 진행방향과의 각도차(이를 스큐(skew)각이라함)가 기존에 비하여 1/2∼1/3로 줄어든다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light driving device for transmitting light to a head portion with an optical lens using near field phenomenon, which is located on a fixed base to transmit light. A transmission / reception part optical system for receiving incident light; Optical path adjusting means for adjusting an optical path of the light emitted from the transmission / reception part optical system; At least two or more rotational driving units to rotate the head unit and to maintain the head unit in a predetermined direction; And a head connection part connecting the head part and the rotation driving part to direct the traveling direction of the light passing through the optical path adjusting means from the transmitting / receiving part optical system to the optical lens. When the optical drive device according to the present invention is used, the rotation speed of the rotation drive unit is increased, and the data access time is reduced. Further, the angle difference between the radial direction at the time of disk rotation and the slider advancing direction (this is called skew angle) is reduced to 1/2 to 1/3 compared with the conventional one.
Description
본 발명은 니어필드(near field)현상을 이용하여 광을 광학렌즈(대물렌즈)가 있는 헤드부까지 송출하기위한 광구동장치에 관한 것으로, 보다 상세하게는 송/수광부광학계가 회전구동부와 분리되고, 회전광학계를 이용하는 광구동장치에 관한 것이다.The present invention relates to an optical driving apparatus for transmitting light to a head portion having an optical lens (objective lens) using near field phenomenon, and more particularly, a transmission / receiving portion optical system is separated from a rotation driving portion. The present invention relates to an optical drive device using a rotating optical system.
기존 광기록/저장장치의 광픽업은 광학적인 파필드(far field)현상을 이용하는 것으로, 대물렌즈에 의해 집광된 레이져광은 공기인 매질을 통과하여 저장매체인 디스크로 향하게 된다. 그러나, 이러한 광기록/저장장치의 경우 집광되는 광스폿의 크기를 작게 하는 것에 한계가 있어 대물렌즈의 개구수를 0.6이상으로 하는 데는 어려움이 있다. 그래서, 이러한 어려움을 극복하기 위해 광학적인 니어필드(near field)현상을 이용하는 기술이 대두되고 있다. 이러한 기술에서는 대물렌즈에 의해 집광되는 광이 대물렌즈를 구성하는 매질 내부에 맺히게 된다. 이 때의 매질은 공기가 아니고, 일정한 굴절률n을 지니며, 이러한 매질로 인해 첫째광원으로 사용되는 광의 파장은 λ에서 λ/n로 줄어들며, 대물렌즈의 개구수는 n배 증가한다. 또한, 대물렌즈에 의해 집광되는 광스폿의 크기는 대물렌즈의 개구수에 반비례하고 파장에 비례하므로, 니어필드현상으로 인한 집광되는 광스폿의 크기는 대물렌즈를 구성하는 매질 굴절율n의 제곱승으로 감소한다.The optical pickup of the conventional optical recording / storage device uses an optical far field phenomenon, and the laser light collected by the objective lens passes through a medium that is air and is directed to a disk, which is a storage medium. However, in the case of such an optical recording / storage apparatus, there is a limit in reducing the size of the light spot to be focused, which makes it difficult to set the numerical aperture of the objective lens to 0.6 or more. Therefore, a technique using optical near field phenomenon has emerged to overcome these difficulties. In this technique, the light collected by the objective lens is condensed inside the medium constituting the objective lens. At this time, the medium is not air and has a constant refractive index n. Due to this medium, the wavelength of light used as the first light source decreases from λ to λ / n, and the numerical aperture of the objective lens increases by n times. In addition, since the size of the light spot condensed by the objective lens is inversely proportional to the numerical aperture of the objective lens and proportional to the wavelength, the size of the light spot condensed by the near field phenomenon is the square power of the refractive index n of the medium constituting the objective lens. Decreases.
이러한 니어필드현상을 이용한 광기록/저장장치에 관련한 기존의 특허 US5,125,750호에서는 광의 집광을 위해 기존의 비구면 대물렌즈와 디스크쪽은 평면이며 반대쪽은 구면인 반구의 렌즈(Solid Immersion Lens; SIL)를 사용한다. 또한, 광기록/저장장치의 구조는 기존의 하드디스크 드라이브와 유사한 구조로 되며, 회전구동부(swing arm)상에 송/수광부 광학계가 놓이고, 슬라이더(slider)에는 대물렌즈가 있는 형태이다.Patent No. 5,125,750 related to the optical recording / storage device using the near-field phenomenon shows that the conventional aspherical objective lens and the disk side are planar and the other side is spherical solid lens (SIL) for light condensing. Use In addition, the optical recording / storage device has a structure similar to that of a conventional hard disk drive, in which a transmission / receiver optical system is placed on a swing arm, and a slider has an objective lens.
그러나, 상술한 니어필드현상을 이용한 광기록/저장장치에서 송/수광부 광학계가 회전구동부상에 놓이게 되면 회전구동부의 구조가 복잡하게 되고, 무게가 증가하여 회전관성모멘트의 증가로 인해서 헤드의 엑세스(acess)속도가 지연되는 문제가 있다.However, in the optical recording / storage apparatus using the near-field phenomenon, when the optical system of the transmitting / receiving part is placed on the rotating driving part, the structure of the rotating driving part becomes complicated, and the weight is increased to increase the rotational moment of inertia. acess) There is a problem that the speed is delayed.
따라서, 이와 같은 문제점을 해결하기 위해 본 발명에서는 송/수광부광학계가 회전구동부와 분리되어 고정된 베이스(base)상에 위치하고, 회전광학계를 이용하는 광구동장치를 제공하고자 한다.Accordingly, in order to solve such a problem, the present invention is to provide an optical drive device using a rotating optical system, in which the transmitting / receiving part optical system is located on a fixed base separated from the rotating driving part.
도 1은 본 발명에 따른 광구동장치를 대물렌즈의 위치에 따라 도시한 구성도,1 is a configuration diagram showing the optical drive device according to the present invention according to the position of the objective lens,
도 2는 본 발명에 따른 광구동장치의 입체구성도,2 is a three-dimensional configuration diagram of an optical drive device according to the present invention;
도 3, 4는 본 발명에 따른 광구동장치의 다른 실시예를 나타내는 구성도 및 입체구성도,3 and 4 is a configuration diagram and a three-dimensional configuration diagram showing another embodiment of the optical drive device according to the present invention;
도 5는 상/하이송장치와 광구동장치의 연결을 나타낸 구성도.Figure 5 is a block diagram showing the connection of the high / high feeder and the optical drive device.
<도면의 주요부분에 대한 설명><Description of main parts of drawing>
4,5 : 회전구동부 6 : 헤드연결부4,5: rotary drive part 6: head connection
12 : 회전광학계 16 : 송/수광부광학계12: Rotating optical system 16: Transmission / receiving optical system
20 : 상하이송장치20: Shanghai transport equipment
이와 같은 목적을 달성하기 위한 본 발명의 특징은 니어필드(near field)현상을 이용하여 광을 광학렌즈가 있는 헤드부까지 송출하기위한 광구동장치에 있어서, 고정된 베이스(base)상에 위치하여 광을 송출하고 입사되는 광을 수광하는 송/수광부광학계; 상기 송/수광부광학계로부터 출사되는 광의 광로를 조정하는 광로조정수단; 상기 헤드부의 구동을 회전형으로 하며, 상기 헤드부가 일정방향을 유지하도록하는 적어도 둘 이상의 회전구동부; 및 상기 헤드부와 회전구동부를 연결하며, 상기 송/수광부광학계로부터 광로조정수단을 통과한 광의 진행방향이 상기 광학렌즈로 향하도록 하는 헤드연결부를 구비하는 광구동장치에 있다.A feature of the present invention for achieving the above object is that in the optical drive device for transmitting the light to the head portion with the optical lens using the near field phenomenon, it is located on a fixed base A transmission / reception part optical system for transmitting light and receiving incident light; Optical path adjusting means for adjusting an optical path of the light emitted from the transmission / reception part optical system; At least two or more rotational driving units to rotate the head unit and to maintain the head unit in a predetermined direction; And a head connection part connecting the head part and the rotation driving part and directing a traveling direction of the light passing through the optical path adjusting means from the transmission / reception part optical system to the optical lens.
첨부한 도면들을 참조하여 본 발명을 구현한 바람직한 실시 예들을 설명하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.
도 1은 본 발명에 따른 광구동장치를 대물렌즈의 위치에 따라 도시한 구성도이고, 도 2는 본 발명에 따른 광구동장치의 입체구성도이다.1 is a block diagram showing the optical drive device according to the present invention according to the position of the objective lens, Figure 2 is a three-dimensional configuration diagram of the optical drive device according to the present invention.
도 1a는 대물렌즈(미도시됨)가 디스크(1)의 중간에 있는 경우이고, 도 1b는 대물렌즈가 디스크의 외측에 있는 경우이고, 도 1c는 대물렌즈가 디스크의 내측에 있는 경우를 나타낸다.FIG. 1A shows a case where an objective lens (not shown) is in the middle of the disc 1, FIG. 1B shows a case where the objective lens is outside the disc, and FIG. 1C shows a case where the objective lens is inside the disc. .
도 1 및 2를 참조하여 광구동장치의 연결동작에 대해 좀 더 자세히 설명하도록 한다.With reference to Figures 1 and 2 will be described in more detail the connection operation of the optical drive device.
도 1 및 2에 도시된 바와 같이 레이져광을 출사하고, 디스크(1)로부터 되돌아오는 광을 수광하는 송/수광부 광학계(16)는 회전구동부(swing arm)(4,5)에 부착되지않고, 고정된 베이스(base)상에 부착된다. 회전구동부(4,5)는 이중으로 된 구조로서, 주회전구동부(4)와 부회전구동부(5)로 이루어지며, 각 회전구동부(4,5)의 회전운동은 자유롭다. 그리고, 회전구동부(4,5)를 회전시키기위한 코일부(3)는 편의상 주회전구동부(4)에 연결하여 도시하였으나, 부회전구동부(5) 또는 주,부회전구동부(4,5) 양쪽 모두에 연결되어도 무방하다. 각 회전구동부(4,5)의 한 쪽끝은 피봇으로 헤드연결부(6)와 연결되어 있어, 각 회전구동부(4,5)의 회전시 헤드연결부(6)는 일정한 방향을 유지한다. 헤드연결부(6)는 송/수광부광학계(16)로부터 출사되는 레이져광의 진행방향을 대물렌즈(9)로 향하도록 하기위한 광학소자(광학유리 또는 프리즘)(7)와 광학소자(7)의 좌 우에 위치한 감지센서(8)로 이루어진다. 이 감지센서(8)는 각 좌 우센서로 입사되는 광을 검출하여 전기적 신호값으로 변환한 후, 이 신호값을 차등하여 차등값이 영(zero)이 되도록 회전광학계 액튜에이터를 구동시키는 구동부(미도시됨)와 함께 이루어진다. 헤드연결부(6) 하단에는 판스프링(HDD사용 용어로는 suspension)(11)이 연결되고, 판스프링(11)에는 슬라이더(10)가 연결된다. 이 슬라이더(10)는 디스크(1)회전시 공기막(air film)에 의해 디스크(1)로부터 일정 높이 부상한다. 슬라이더(10)에는 대물렌즈(9)가 부착되어 있어, 입사되는 레이져광이 디스크(1)의 표면에 집광된다.As shown in Figs. 1 and 2, the transmitter / receiver optical system 16 which emits laser light and receives the light returned from the disk 1 is not attached to the swing arms 4 and 5, It is attached on a fixed base. The rotary driving units 4 and 5 have a dual structure, and are composed of the main rotary driving unit 4 and the sub rotary driving unit 5, and the rotational movement of each of the rotary driving units 4 and 5 is free. In addition, although the coil unit 3 for rotating the rotary driving units 4 and 5 is illustrated by being connected to the main rotary driving unit 4 for convenience, both the sub rotary driving unit 5 or the main and secondary rotating driving units 4 and 5 are shown. It may be connected to all. One end of each of the rotary drive units 4 and 5 is pivotally connected to the head connecting unit 6, so that the head connecting unit 6 maintains a constant direction when the rotary drive units 4 and 5 rotate. The head connection part 6 has an optical element (optical glass or prism) 7 and a left side of the optical element 7 for directing the traveling direction of the laser light emitted from the transmission / reception optical system 16 to the objective lens 9. It consists of a sensor 8 located at the right. The sensor 8 detects the light incident on each of the left and right sensors, converts the signal into an electrical signal value, and then drives the rotating optical system actuator to differentiate the signal value so that the differential value becomes zero. Shown). A leaf spring (suspension in HDD terminology) 11 is connected to the lower end of the head connection 6, and a slider 10 is connected to the leaf spring 11. This slider 10 rises a certain height from the disk 1 by an air film when the disk 1 rotates. An objective lens 9 is attached to the slider 10 so that incident laser light is focused on the surface of the disk 1.
회전구동부(4,5)가 디스크의 중간, 내/외측으로 이동함에 따라 대물렌즈(9)의 위치는 변하게 되고, 이로 인해 고정된 베이스상에 있는 송/수광부광학계(16)에서 출사되는 레이져광의 광로도 변하게 된다. 따라서, 송/수광부광학계(16)에서 출사되는 레이져광의 광로를 조정하여 대물렌즈(9)로 보내기위한 광학계(이하 회전광학계;반사경)(12)가 사용된다. 또한, 회전구동부(4,5)의 회전시 회전광학계(12)를 회전시키기 위한 회전광학계 액튜에이터가 설치되는 데, 이 회전광학계 액튜에이터는 코일(13), 자석(14) 그리고 회전홀더(15)로 이루어진다. 그래서, 회전홀더(15)위에 회전광학계(12)가 올려지고, 회전홀더(15)의 양쪽에는 코일(13)이 감겨져있으며, 코일(13)주위에는 자석(14)이 둘러싸고 있다. 이러한 회전광학계 액튜에이터구조는 일반 전기회전방식모터의 구조와 동일하다.The position of the objective lens 9 changes as the rotary drive units 4 and 5 move to the middle, inside / outside of the disc, thereby causing the laser light emitted from the transmitting / receiving part optical system 16 on the fixed base. The light path also changes. Therefore, an optical system (hereinafter referred to as a rotating optical system; reflector) 12 for adjusting the optical path of the laser light emitted from the transmitting / receiving optical system 16 and sending it to the objective lens 9 is used. In addition, a rotating optical actuator for rotating the rotating optical system 12 when the rotating driving units 4 and 5 are rotated is installed. The rotating optical actuator is provided with a coil 13, a magnet 14, and a rotating holder 15. Is done. Thus, the rotary optical system 12 is mounted on the rotary holder 15, the coil 13 is wound around both sides of the rotary holder 15, and the magnet 14 is surrounded by the coil 13. The rotating optical actuator structure is the same as that of a general electric rotating motor.
그래서, 미도시한 스핀들모터에 의해 디스크(1)가 회전하면, 디스크(1)로부터 일정한 부상량을 유지하는 슬라이더(10)는 미도시한 마이크로컴퓨터의 정보에 따라 디스크(1)의 최내주로 이동한다. 또한, 회전광학계(12)도 초기 설정된 정보에 의해 회전하여 송/수광부 광학계(16)로부터 출사되는 레이져광을 대물렌즈(9)에 입사되도록 한다. 이 후 감지센서(8)와 미도시된 회전광학계 액튜에이터 구동부에 의해 회전광학계(12)가 회전하여, 레이져광을 대물렌즈(9)의 이동방향에 따라 연동시킨다.Therefore, when the disk 1 is rotated by the spindle motor (not shown), the slider 10 which maintains a constant floating amount from the disk 1 is the innermost circumference of the disk 1 according to the information of the microcomputer (not shown). Move. In addition, the rotating optical system 12 is also rotated by the initially set information so that the laser light emitted from the transmitting / receiving unit optical system 16 is incident on the objective lens 9. Thereafter, the rotating optical system 12 is rotated by the sensing sensor 8 and the rotating optical actuator driving unit, thereby interlocking the laser light according to the moving direction of the objective lens 9.
도 3 및 도 4는 본 발명에 따른 광구동장치의 다른 실시예를 나타낸 구성도 및 입체구성도로써, 이 광구동장치는 도 1 및 도 2에 도시한 광구동장치의 구성도 및 입체구성도의 회전광학계(12)에서 반사경 대신 평판유리를 사용한다. 평판유리에 입사한 레이져광은 평판유리 수직면과 입사 레이져광의 입사각도 차이에 의해 그 광로가 변하게 된다. 그리고, 도 3 및 도 4 광구동장치의 각 기능부들은 도 1 및 도 2 광구동장치의 각 기능부들과 동일기능을 지니므로 도 3 및 도 4 광구동장치의 각 기능부들에는 도 1 및 도 2의 각 기능부와 동일한 부호를 부가하였다.3 and 4 is a configuration diagram and a three-dimensional configuration diagram showing another embodiment of the optical drive device according to the present invention, the optical drive device is a configuration diagram and three-dimensional configuration diagram of the optical drive device shown in Figs. In the rotating optical system 12 of using a flat glass instead of a reflector. The laser light incident on the flat glass changes its light path due to the difference in incidence angle between the flat surface of the flat glass and the incident laser light. 3 and 4 have the same function as those of the optical drive of FIGS. 1 and 2, and therefore, the functional units of FIGS. The same code | symbol as each functional part of 2 was added.
본 발명에 따른 또 다른 실시예의 광구동장치는 도 2 및 도 4에서 감지센서(8)을 없애고, 감지센서의 기능을 미도시한 마이크로컴퓨터가 대행하는 광구동장치이다. 그래서, 마이크로컴퓨터는 초기상태에서 이동한 대물렌즈의 위치정보를 디스크에 기록된 주소정보(address mark) 또는 회전구동부의 제어부에 가해진 신호정보를 이용하여, 회전구동부의 회전위치를 파악한 후 회전광학계액튜에이터구동부에 적절한 이동신호를 보냄으로써 감지센서의 기능을 대행하게 된다.The optical drive device of another embodiment according to the present invention is an optical drive device that is eliminated by the sensor 8 in FIGS. 2 and 4 and is replaced by a microcomputer that does not show the function of the sensor. Therefore, the microcomputer uses the position information of the objective lens moved in the initial state, using the address information recorded on the disk or the signal information applied to the control unit of the rotational drive, to determine the rotational position of the rotational drive, and then to the rotating optical actuator. By sending an appropriate movement signal to the driver, it acts as a sensor.
도 5는 상/하이송장치가 광구동장치와 연결된 구성을 나타낸다. 도시한 바와 같이 상/하이송장치(20)는 송/수광부광학계(16) 및 회전광학계와 회전광학계액튜에이터를 결합한 광학계(19)를 상/하로 이동시키는 기능을 수행하고, 이로인해 한 개의 송/수광부광학계(16)로 다중 디스크의 다중 기록정보면의 정보를 읽거나 기록이 가능하게 된다.5 shows a configuration in which the high / high feeder is connected to the optical drive device. As shown in the figure, the up / down conveying apparatus 20 performs a function of moving the transmission / receiving part optical system 16 and the optical system 19 which combines the rotating optical system and the rotating optical system actuator up and down, thereby allowing one The light receiving optical system 16 enables reading or recording of information on multiple recording information surfaces of multiple disks.
상술한 바와 같이, 본 발명에 따른 광구동장치의 송/수광부광학계가 회전구동부와 연결되지않으므로, 회전구동부의 구조가 간단해지며 회전구동부의 무게가 줄어들게 된다. 그래서, 회전구동부의 회전속도가 빠르게 되고, 데이터액세스시간이 줄어든다. 또한, 디스크회전시의 반경방향과 슬라이더 진행방향과의 각도차(이를 스큐(skew)각이라함)가 기존에 비하여 1/2∼1/3로 줄어든다.As described above, since the transmission / receiving part optical system of the optical drive device according to the present invention is not connected to the rotary drive part, the structure of the rotary drive part is simplified and the weight of the rotary drive part is reduced. Thus, the rotational speed of the rotational drive is increased, and the data access time is reduced. Further, the angle difference between the radial direction at the time of disk rotation and the slider advancing direction (this is called skew angle) is reduced to 1/2 to 1/3 compared with the conventional one.
Claims (4)
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| KR1019980020225A KR100294236B1 (en) | 1998-06-01 | 1998-06-01 | Optical driving device using near field phenomenon |
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| KR1019980020225A KR100294236B1 (en) | 1998-06-01 | 1998-06-01 | Optical driving device using near field phenomenon |
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| KR100294236B1 true KR100294236B1 (en) | 2001-07-12 |
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