KR100438582B1 - Slider head apparatus of magneto-optic recording/reproducing system - Google Patents
Slider head apparatus of magneto-optic recording/reproducing system Download PDFInfo
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- KR100438582B1 KR100438582B1 KR10-2001-0084337A KR20010084337A KR100438582B1 KR 100438582 B1 KR100438582 B1 KR 100438582B1 KR 20010084337 A KR20010084337 A KR 20010084337A KR 100438582 B1 KR100438582 B1 KR 100438582B1
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- coil
- lens
- magneto
- optical
- solid immersion
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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
- G11B7/121—Protecting the head, e.g. against dust or impact with the record carrier
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10532—Heads
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/16—Supporting the heads; Supporting the sockets for plug-in heads
- G11B21/20—Supporting the heads; Supporting the sockets for plug-in heads while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier
- G11B21/21—Supporting the heads; Supporting the sockets for plug-in heads while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier with provision for maintaining desired spacing of head from record carrier, e.g. fluid-dynamic spacing, slider
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/14—Reducing influence of physical parameters, e.g. temperature change, moisture, dust
- G11B33/1406—Reducing the influence of the temperature
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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
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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
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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
- G11B2007/13727—Compound lenses, i.e. two or more lenses co-operating to perform a function, e.g. compound objective lens including a solid immersion lens, positive and negative lenses either bonded together or with adjustable spacing
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2525—Magneto-optical [MO] discs
Abstract
본 발명의 광자기 기록/재생기의 슬라이더 헤드장치는 집광렌즈(22)의 하측에 집속렌즈인 솔리드 이머젼 렌즈(23)가 배치되어 있고, 그 솔리드 이머젼 렌즈(23)의 하측에 제 1코일(24)이 배치되어 있으며, 상부에 제 2코일(25)이 배치되어 있어서, 전류를 제 1코일(24)과 제 2코일(25)에 동시에 공급함으로써, 기록에 필요한 자력발생이 분산됨에 따라 솔리드 이머젼 렌즈(23)의 과열에 의한 이물질오염이 감소된다.In the slider head device of the magneto-optical recording / reproducing apparatus of the present invention, a solid immersion lens 23, which is a focusing lens, is disposed below the condenser lens 22, and a first coil 24 is disposed below the solid immersion lens 23. ), And the second coil 25 is disposed at the top, so that the current is supplied to the first coil 24 and the second coil 25 at the same time, so that the magnetic force required for recording is dispersed. Foreign material contamination due to overheating of the lens 23 is reduced.
Description
본 발명은 근접장을 이용한 광자기 기록/재생기에 관한 것으로, 보다 상세하게는 솔리드 이머젼 렌즈의 하측에 집중적으로 발생되는 열을 솔리드 이머젼 렌즈의 상측과 하측에 분산되도록 하여 집중과열에 의한 오염 및 열변형 발생이 감소되도록 한 광자기 기록/재생기의 슬라이더 헤드장치에 관한 것이다.The present invention relates to a magneto-optical recording / reproducing apparatus using a near field, and more particularly, to disperse heat generated intensively under the solid immersion lens to the upper side and the lower side of the solid immersion lens, thereby causing contamination and thermal deformation due to intensive superheat. A slider head device of a magneto-optical recorder / player for reducing generation.
최근에는 빛의 회절이 발생되지 않는 범위내에서 기록밀도를 높이는 방법인 근접장(NEAR FIELD)을 이용한 근접장 광기록/재생에 대한 연구가 급속도로 진행되고 있다.Recently, research on near-field optical recording / reproducing by using a near field (NEAR FIELD), which is a method of increasing recording density within a range where light diffraction does not occur, is rapidly progressing.
이러한 근접장을 이용한 광기록 및 재생방식은 렌즈내에서 빛을 전반사시켜서 렌즈 표면에 에버네슨트 웨이브(EVANESCENT WAVE)를 발생시키고, 에버네슨트 웨이브와 기록매체의 커플링(COUPLING)에 의하여 기록 및 재생이 이루어지는 페이스 체인지 방식(PHASE CHANGE TYPE)과, 렌즈의 하측에 코일을 설치하고, 그 코일에 전류를 인가하여 발생되는 자력으로 광자기의 방향으로 변화시키도록 되어 있는 광자기 방식(MAGNETO-OPTIC TYPE) 등이 소재되고 있다.The optical recording and reproducing method using such a near field totally reflects the light in the lens to generate an EVANESCENT WAVE on the surface of the lens, and to record and reproduce it by COUPLING of the AVERNEENT WAVE and a recording medium. This phase change type (PHASE CHANGE TYPE) and a magnet is provided on the lower side of the lens, and the magneto-optical method (MAGNETO-OPTIC TYPE) is to change the direction of the magneto-optical magnetic force generated by applying a current to the coil. ) And the like.
도 1은 상기의 광자기 방식을 이용한 광기록/재생기를 보인 일예로서, 도시된 바와 같이, 데크(2) 내에는 기록매체인 디스크(3)의 중앙부가 스핀들 모터(미도시)에 장착되어 회전가능하게 설치되어 있고, 그 디스크(3)의 일측에는 픽업부(4)가 설치되어 있다.FIG. 1 is an example of an optical recorder / player using the magneto-optical method. As shown in FIG. 1, the center portion of the disk 3, which is a recording medium, is mounted on a spindle motor (not shown) in the deck 2. It is provided so that the pick-up part 4 is provided in one side of the disk 3. As shown in FIG.
그리고, 상기 디스크(3)의 상부에는 후단부가 픽업부(4)에 고정되어 있는 서스펜션 아암(5)이 결합되어 있고, 그 서스펜션 아암(5)의 전단부에는 부상형 헤드슬라이더(6)가 장착되어 있으며, 그 부상형 헤드슬라이더(6)에는 광학계(7)가 결합되어 있다.A suspension arm 5 having a rear end fixed to the pickup 4 is coupled to the upper portion of the disk 3, and a floating head slider 6 is mounted to the front end of the suspension arm 5. An optical system 7 is coupled to the floating head slider 6.
또한, 상기 픽업부(4)의 하부에는 VCM(VOICE COIL MOTOR)(8)가 설치되어 있어 상기 픽업부(4)가 일정한 범위의 각도로 회전할 수 있도록 되어 있다.In addition, a VCM (VOICE COIL MOTOR) 8 is provided below the pick-up part 4 so that the pick-up part 4 can rotate at a predetermined range of angles.
그리고, 상기 헤드슬라이더(6)의 상부에는 후단부가 픽업부(4)에 고정되는 고정암(8)이 배치되어 있고, 그 고정암(8)의 단부에는 프리즘(9)이 장착되어 있다.The upper end of the head slider 6 is provided with a fixed arm 8 whose rear end is fixed to the pick-up part 4, and a prism 9 is mounted at the end of the fixed arm 8.
상기와 같은 종래의 장치는 픽업부(4)의 광원에서 발생하는 빛은 상기 프리즘(9)에서 경로가 바뀌어 헤드슬라이더(6)에 장착되어 있는 광학계(7)를 통과하여 디스크(3)의 표면에 입사되고, 그와 같이 입사된 빛과 디스크(3) 표면과의 상호작용에 의하여 광정보의 기록 또는 재생이 이루어진다.In the conventional apparatus as described above, the light generated from the light source of the pickup unit 4 is changed in the path of the prism 9 and passes through the optical system 7 mounted on the head slider 6 so that the surface of the disk 3 can be obtained. The optical information is recorded or reproduced by the interaction of the incident light and the incident light with the surface of the disc 3.
도 2는 상기 헤드슬라이더(6)에 장착된 광학계(7)를 보인 모식도로서, 이 광학계(7)은 집광렌즈(11)의 하측인 빛의 진행경로상에 반구형 솔리드 이머젼 렌즈(SIL:SOLID IMMERSION LENS)(12)가 배치되어 있고, 그 솔리드 이머젼 렌즈(12)의 하측에 자력을 발생시키 위한 마그네틱 코일(13)이 고정구(14)에 의하여 고정되도록 결합되어 있다.FIG. 2 is a schematic view showing an optical system 7 mounted on the head slider 6, which is a hemispherical solid immersion lens (SIL: SOLID IMMERSION) on a traveling path of light which is the lower side of the condenser lens 11. LENS) 12 is disposed, and a magnetic coil 13 for generating magnetic force is coupled to the lower side of the solid immersion lens 12 so as to be fixed by the fixture 14.
이와 같이 배치되는 솔리드 이머젼 렌즈(12)의 상면은 구면이고, 아랫면은 평면인 반구형으로 되어 있으며, 솔리드 이머젼 렌즈(12)의 평면부 중심이 집광렌즈(11)의 촛점과 일치하도록 되어 있다. 따라서 집광렌즈(11)에 입사된 빛(13)은굴절되어 솔리드 이머젼 렌즈(12)의 하면 평면부 중심에 모이게 된다.The upper surface of the solid immersion lens 12 disposed as described above is spherical, the lower surface is planar hemispherical, and the center of the planar portion of the solid immersion lens 12 coincides with the focus of the condensing lens 11. Therefore, the light 13 incident on the condenser lens 11 is refracted and collected at the center of the lower surface of the solid immersion lens 12.
그리고, 상기의 집광렌즈(11)와 솔리드 이머젼 렌즈(12)를 통과한 광이 디스크(3)의 표면을 가열하고, 마그네틱 코일(13)에 전류를 인가하면 마그네틱 코일(13)에 발생되는 자력방향으로 디스크(3)의 광자기 방향으로 바꾸어 기록을 하게 된다.When the light passing through the condenser lens 11 and the solid immersion lens 12 heats the surface of the disk 3 and a current is applied to the magnetic coil 13, the magnetic force generated in the magnetic coil 13 is generated. Direction to the magneto-optical direction of the disc 3 to record.
그러나, 상기와 같은 종래의 광자기 방식의 광기록/재생기에서는 자력을 발생시키기 위해 마크네틱 코일(13)에 전류를 가할때에 그 주변에 많은 열이 발생되고, 그와 같은 열이 솔리드 이머젼 렌즈(12)와 다른 부품들까지 전달되어 그 주변의 온도를 수백도까지 올라가게 하여 솔리드 이머젼 렌즈(12)의 하면에 이물질들이 쉽게 부착되고, 변형이 발생되어 입사되는 빛(13)을 왜곡시키는 문제점이 있었다.However, in the above conventional magneto-optical optical recorder / regenerator, a lot of heat is generated when a current is applied to the magnetic coil 13 to generate a magnetic force, and such heat is a solid immersion lens. (12) and other components are transmitted to raise the ambient temperature to several hundred degrees, the foreign matter is easily attached to the lower surface of the solid immersion lens 12, the deformation is generated to distort the incident light 13 There was this.
상기와 같은 문제점을 감안하여 안출한 본 발명의 목적은 솔리드 이머젼 렌즈의 하측에 집중적으로 발생되는 열이 다른쪽으로 분산되도록 하여 집중과열에 의한 렌즈의 오염 및 열변형이 발생되는 것을 감소시키도록 하는데 적합한 광자기 기록/재생기의 슬라이더 헤드장치를 제공함에 있다.The object of the present invention devised in view of the above problems is that the heat intensively generated on the lower side of the solid immersion lens is dispersed to the other side, which is suitable to reduce the occurrence of contamination and thermal deformation of the lens due to intensive overheating. A slider head device for a magneto-optical recorder / player is provided.
도 1은 종래 광자기 기록/재생기의 구조를 보인 사시도.1 is a perspective view showing the structure of a conventional magneto-optical recorder / player.
도 2는 종래의 광학계를 보인 단면도.2 is a cross-sectional view showing a conventional optical system.
도 3은 본 발명의 광자기 기록/재생기의 슬라이더 헤드장치의 실시예를 보인 단면도.Fig. 3 is a sectional view showing an embodiment of the slider head device of the magneto-optical recorder / player of the present invention.
도 4는 본 발명의 보조 마그네틱 코일을 보인 평면도.Figure 4 is a plan view showing an auxiliary magnetic coil of the present invention.
** 도면의 주요 부분에 대한 부호의 설명 **** Description of symbols for the main parts of the drawing **
3 : 디스크 21 : 빛3: disc 21: light
22 : 집광렌즈 23 : 솔리드 이머젼 렌즈22 condenser lens 23 solid immersion lens
24 : 제 1코일 25 : 제 2코일24: first coil 25: second coil
상기와 같은 본 발명의 목적을 달성하기 위하여 광자기 기록/재생기의 슬라이더 헤드장치에 있어서,빛을 굴절시켜서 하측으로 모으기 위한 집광렌즈와,그 집광렌즈에서 굴절된 빛을 디스크의 표면에 전달하여 광근접장을 발생시키는 집속렌즈와,상기 집속렌즈의 하면에 설치되어 디스크의 광자기 방향을 변환시키기 위한 제 1코일과,상기 집광렌즈와 집속렌즈의 사이에 설치되어 제 1코일과 함께 자력을 발생시킴과 아울러 발생되는 열을 분산시키기 위한 제 2코일을 포함하여 구성되는 것을 특징으로 하는 광자기 기록/재생기의 슬라이더 헤드장치가 제공된다.In order to achieve the object of the present invention as described above, in the slider head apparatus of a magneto-optical recorder / reproducer, a condenser lens for refracting light and collecting the light downward, and transmitting the light refracted by the condenser lens to the surface of the disk A focusing lens for generating a near field, and a first coil installed on a lower surface of the focusing lens for converting a magneto-optical direction of the disk, and installed between the focusing lens and the focusing lens to generate a magnetic force together with the first coil. In addition, there is provided a slider head device of a magneto-optical recording / reproducing apparatus comprising a second coil for dispersing generated heat.
상기와 같은 본 발명은 집속렌즈를 기록매체의 표면에 근접하게 위치시키고, 그 집속렌즈를 통과한 빛이 기록매체의 표면에 조사되어 발생되는 광근접장 현상을 이용하여 기록매체의 표면에 데이터를 기록하거나 재생하게 되는데, 제 2코일과 제 1코일에 전류가 인가되어 동시에 자력이 발생되므로 그 코일들에서 발생되는 열이 분산이 되어 열발생에 의한 솔리드 이머젼 렌즈의 오염발생이 감소되고, 솔리드 이머젼 렌즈의 열변형에 의한 빔의 왜곡이 감소된다.In the present invention as described above, the focusing lens is positioned close to the surface of the recording medium, and data is recorded on the surface of the recording medium by using the optical near-field phenomenon generated by the light passing through the focusing lens being irradiated onto the surface of the recording medium. When the current is applied to the second coil and the first coil to generate magnetic force at the same time, heat generated from the coils is dispersed to reduce contamination of the solid immersion lens due to heat generation, and the solid immersion lens The distortion of the beam due to thermal deformation of is reduced.
이하, 상기와 같은 본 발명 광자기 기록/재생기의 슬라이더 헤드장치를 첨부된 도면의 실시예를 참고하여 보다 상세히 설명하면 다음과 같다. 종래와 동일한 부분에 대하여는 동일부호를 부여하여 설명한다.Hereinafter, the slider head device of the inventive magneto-optical recorder / player as described above will be described in more detail with reference to an embodiment of the accompanying drawings. The same parts as in the prior art will be described with the same reference numerals.
도 3은 본 발명에 따른 광자기 기록/재생기의 슬라이더 헤드장치를 보인 단면도로서, 도시된 바와 같이, 광원에서 입사되는 빛(21)을 하측으로 굴절시키는 집광렌즈(22)가 배치되어 있는데, 그 집광렌즈(22) 하측의 광경로상에는 빛(21)의 집광렌즈(22)에서 입사되는 빛(21)이 하면의 중심부에 모이게 되는 집속렌즈인 솔리드 이머젼 렌즈(23)가 배치되어 있다.3 is a cross-sectional view showing a slider head device of a magneto-optical recorder / reproducer according to the present invention, and as shown, a condenser lens 22 for refracting the light 21 incident from the light source is arranged. On the optical path under the condenser lens 22, a solid immersion lens 23, which is a condenser lens, in which the light 21 incident from the condenser lens 22 of the light 21 is collected at the center of the lower surface is disposed.
그리고, 상기 솔리드 이머젼 렌즈(23)의 하측에는 디스크(3)의 광자기 방향을 변환시키기 위한 제 1코일(24)이 배치되어 있는데, 상기 솔리드 이머젼 렌즈(23)와 집광렌즈(22)의 사이에도 상기 제 1코일(24)의 부하발생을 감소시키기 위한 제 2코일(25)이 배치되어 있다.In addition, a first coil 24 for displacing the magneto-optical direction of the disk 3 is disposed below the solid immersion lens 23, and between the solid immersion lens 23 and the condenser lens 22. In addition, a second coil 25 is disposed to reduce the occurrence of load on the first coil 24.
상기와 같이 구성된 본 발명에서는, 집광렌즈(22)로 입사되어는 빛(21)이 광경로상의 솔리드 이머젼 렌즈(23)의 하면 중심부에 모이게 되고, 그와 같이 모인 빛은 디스크(3)의 표면을 가열하게 되며, 이때에 제 1코일(24)에 전류가 인가되어 자력이 발생되어 지며, 그와 같이 코일에 의하여 발생된 자력방향으로 디스크(3)의 광자기 방향을 바꾸어 기록이 된다.In the present invention configured as described above, the light 21 incident on the condenser lens 22 is collected at the center of the lower surface of the solid immersion lens 23 on the optical path, and the light thus gathered is the surface of the disk 3. At this time, a current is applied to the first coil 24 to generate a magnetic force, and the magneto-optical direction of the disk 3 is changed in the magnetic force generated by the coil.
여기서, 상기 제 1코일(24)에 기록에 필요한 자력의 약70% 정도가 발생되도록 한다면 나머지 30%는 상부에 배치된 마드네틱 코일인 제 2코일(25)에 전류를 인가하여 자력이 발생되어 지도록 하는데, 그와 같은 점때문에 제 1코일(24)에 가하는 전류를 최소화하는 것이 가능하여 하부에 배치된 마스네틱 코일인 제 1코일(24)의 주변에 높은 열이 발생되는 것을 감소시킬 수 있다.Here, if about 70% of the magnetic force required for recording is generated in the first coil 24, the remaining 30% is applied to the second coil 25, which is a magnetic coil disposed above, to generate magnetic force. Because of this, it is possible to minimize the current applied to the first coil 24 to reduce the generation of high heat around the first coil 24, which is a magnetic coil disposed below. .
따라서, 제 1코일(24) 주변의 과열에 의한 솔리드 이머젼 렌즈(23)의 오염을 감소시킬 수 있고, 열변형에 따른 빔의 왜곡발생도 감소시킬 수 있다.Therefore, contamination of the solid immersion lens 23 due to overheating around the first coil 24 may be reduced, and distortion of the beam due to thermal deformation may be reduced.
이상에서 상세히 설명한 바와 같이, 본 발명 광자기 기록/재생기의 슬라이더 헤드장치는 집속렌즈인 솔리드 이머젼 렌즈의 하측에 제 1코일을 배치함과 아울러 솔리드 이머젼 렌즈와 집광렌즈의 사이에도 제 2코일을 배치하여, 전류를 제 1코일과 제 2코일에 동시에 공급함으로써, 기록에 필요한 자력발생이 7:3정도로 분산됨에 따라 과열발생을 감소시켜서 솔리드 이머젼 렌즈의 이물질오염이 감소되고, 솔리드 이머젼 렌즈의 열변형에 의한 빔의 왜곡발생이 감소되는 효과가 있다.As described above in detail, the slider head device of the magneto-optical recorder / reproducer of the present invention arranges the first coil under the solid immersion lens as the focusing lens and also arranges the second coil between the solid immersion lens and the condenser lens. By simultaneously supplying the current to the first coil and the second coil, the magnetic force required for recording is dispersed to about 7: 3, thereby reducing the overheating and reducing the contamination of the solid immersion lens, and thermal deformation of the solid immersion lens. The distortion caused by the beam is reduced.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| KR10-2001-0084337A KR100438582B1 (en) | 2001-12-24 | 2001-12-24 | Slider head apparatus of magneto-optic recording/reproducing system |
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| Application Number | Priority Date | Filing Date | Title |
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| KR10-2001-0084337A KR100438582B1 (en) | 2001-12-24 | 2001-12-24 | Slider head apparatus of magneto-optic recording/reproducing system |
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| KR20030054208A KR20030054208A (en) | 2003-07-02 |
| KR100438582B1 true KR100438582B1 (en) | 2004-07-02 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09245391A (en) * | 1996-03-13 | 1997-09-19 | Sony Corp | Recorder and its method |
| JP2000173123A (en) * | 1998-12-09 | 2000-06-23 | Sharp Corp | Optical head |
| JP2000207797A (en) * | 1999-01-11 | 2000-07-28 | Sony Corp | Pickup device and its manufacture as well as magnetooptical disk device |
| JP2000285544A (en) * | 1999-03-30 | 2000-10-13 | Sharp Corp | Magnetooptic recording and reproducing device |
| JP2000285542A (en) * | 1999-03-26 | 2000-10-13 | Yamaha Corp | Magnetooptic head |
| JP2001023257A (en) * | 1999-07-05 | 2001-01-26 | Tokin Corp | Recording/reproducing device and its manufacture |
| KR20010043348A (en) * | 1998-05-07 | 2001-05-25 | 미다라이 후지오 | Coil for magnetic head, magnetic head, and magnetic-optical recorder |
| JP2001307302A (en) * | 2000-04-21 | 2001-11-02 | Fujitsu Ltd | Optical head for magneto-optical recording |
-
2001
- 2001-12-24 KR KR10-2001-0084337A patent/KR100438582B1/en not_active IP Right Cessation
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09245391A (en) * | 1996-03-13 | 1997-09-19 | Sony Corp | Recorder and its method |
| KR20010043348A (en) * | 1998-05-07 | 2001-05-25 | 미다라이 후지오 | Coil for magnetic head, magnetic head, and magnetic-optical recorder |
| JP2000173123A (en) * | 1998-12-09 | 2000-06-23 | Sharp Corp | Optical head |
| JP2000207797A (en) * | 1999-01-11 | 2000-07-28 | Sony Corp | Pickup device and its manufacture as well as magnetooptical disk device |
| JP2000285542A (en) * | 1999-03-26 | 2000-10-13 | Yamaha Corp | Magnetooptic head |
| JP2000285544A (en) * | 1999-03-30 | 2000-10-13 | Sharp Corp | Magnetooptic recording and reproducing device |
| JP2001023257A (en) * | 1999-07-05 | 2001-01-26 | Tokin Corp | Recording/reproducing device and its manufacture |
| JP2001307302A (en) * | 2000-04-21 | 2001-11-02 | Fujitsu Ltd | Optical head for magneto-optical recording |
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| KR20030054208A (en) | 2003-07-02 |
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