KR20030032576A - Apparatus for near field optical recorder, manufacturing method thereof - Google Patents
Apparatus for near field optical recorder, manufacturing method thereof Download PDFInfo
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- KR20030032576A KR20030032576A KR1020010064400A KR20010064400A KR20030032576A KR 20030032576 A KR20030032576 A KR 20030032576A KR 1020010064400 A KR1020010064400 A KR 1020010064400A KR 20010064400 A KR20010064400 A KR 20010064400A KR 20030032576 A KR20030032576 A KR 20030032576A
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- lens
- bottom plate
- near field
- small
- slider
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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
- 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
- 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
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
- G11B7/0857—Arrangements for mechanically moving the whole head
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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
- G11B7/22—Apparatus or processes for the manufacture of optical heads, e.g. assembly
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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
- G11B2220/2537—Optical discs
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
Abstract
Description
본 발명은 근접장 광기록재생장치에 관한 것으로서, 상세하게는, 기록매체 표면에 근접하여 대향되는 대향렌즈를 탑재하는 슬라이더의 구조 및 그 제조방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a near field optical recording and reproducing apparatus, and more particularly, to a structure of a slider for mounting an opposing lens opposed to a surface of a recording medium and a manufacturing method thereof.
광기록매체 또는 광자기기록매체는 비트(또는 기록마크) 사이즈가 소형화되어야 하고 트랙폭이 협소하게 되어야 고밀도 기록용량을 가질 수 있게 된다. 그러나 기록매체의 기록막에 비트를 형성하기위해 기록매체 상에 집광되는 광의 스폿 크기는 회절한계에 의해 제약되기 때문에 기록밀도를 향상시키는 데는 한계가 있다.An optical recording medium or a magneto-optical recording medium must have a small bit (or recording mark) size and a narrow track width to have a high density recording capacity. However, since the spot size of the light condensed on the recording medium to form a bit in the recording film of the recording medium is limited by the diffraction limit, there is a limit in improving the recording density.
정보의 대용량화 추세에 비추어 볼 때 기존의 광기록/재생방식의 한계를 극복할 수 있는 새로운 광기록/재생방식이 요구되고 있다. 최근에는 기록용량을 획기적으로 향상시킬 수 있을 것으로 예상되는 근접장(Near Field)을 이용한 근접장 광기록/재생(Near Field Recording/Reproduction)에 대한 연구가 증가되고 있다.In light of the trend of large-capacity information, new optical recording / reproducing methods are required to overcome the limitations of existing optical recording / reproducing methods. In recent years, research on near field recording / reproduction using near field, which is expected to significantly improve recording capacity, has been increasing.
근접장 광기록 및 재생의 원리는 다음과 같다. 렌즈 내부로 임계각 이상의 각도를 갖고 입사하는 빛은 굴절률이 밀한 곳에서 소한 곳으로 진행할 때 빛이 전반사된다. 이 때 빛의 전반사에 의해서 렌즈의 표면에는 아주 미세한 세기의 광이 존재하는데 이것을 에버네슨트 웨이브(evanescent wave) 또는 소산파라고 한다. 이 에버네슨트 웨이브를 이용하면, 기존의 원격장(far-field)에서는 빛의 회절 현상때문에 나타나는 분해능의 절대적인 한계, 즉 회절 한계 때문에 불가능했던 고분해능이 가능하게 된다. 근접장 광 기록 및 재생 광학계는 렌즈 내에서 빛을 전반사시켜 렌즈 표면에 에버네슨트 웨이브를 발생시키고, 에버네슨트 웨이브와 기록매체의 커플링에 의하여 기록 및 재생을 하게 된다.The principle of near field optical recording and reproduction is as follows. Light entering the lens at an angle greater than or equal to the critical angle is totally reflected when traveling from a dense refractive index to a small one. At this time, due to total reflection of light, light of very small intensity exists on the surface of the lens, which is called an evanescent wave or dissipation wave. Using this evernet wave, it is possible to achieve high resolution, which is impossible because of the diffraction limit, which is the absolute limit of the resolution due to the diffraction phenomenon of light in the far-field. The near field optical recording and reproducing optical system totally reflects the light in the lens to generate an Evernet wave on the surface of the lens, and records and plays back by coupling the Evernet wave and the recording medium.
도 1 내지 도 3은 종래의 근접장 광기록재생장치의 구조를 도시한 것으로서, 도 1은 평면도, 도 2는 고체함침렌즈가 장착된 슬라이더부의 확대단면도, 도 3은 고체함침미러가 장착된 슬라이더부의 확대단면도이다.1 to 3 show a structure of a conventional near field optical recording and reproducing apparatus, in which FIG. 1 is a plan view, FIG. 2 is an enlarged cross-sectional view of a slider unit equipped with a solid impregnation lens, and FIG. 3 is a slider unit equipped with a solid impregnation mirror. It is an enlarged cross section.
도시된 바와 같이, 종래의 근접장 광기록재생장치는 베이스에 대해 왕복 회전 가능하게 설치된 스윙암(21)과, 그 스윙암(21)에 회전 구동력을 제공하는 액츄에이터(23)와, 공기동압에 의해 광디스크(10)에 대해 부상된 채로 광디스크(10)의 트랙을 스캔할 수 있도록 상기 스윙암(21)의 단부에 설치된 슬라이더(30)를 포함하여 구성된다.As shown in the drawing, the conventional near field optical recording and reproducing apparatus includes a swing arm 21 reciprocally rotatable with respect to a base, an actuator 23 providing a rotational driving force to the swing arm 21, and pneumatic pressure. And a slider 30 provided at an end of the swing arm 21 so as to scan the track of the optical disc 10 while being lifted with respect to the optical disc 10.
슬라이더(30)는 대물렌즈(31)와 소정의 초점거리만큼 이격되어 장착된 소형렌즈(32) 및 상기 렌즈를 고정하기 위한 본체부(33)를 포함하여 구성되며, 상기 소형렌즈(32)에는 고체함침렌즈(SIL : Solid Immersion Lens)(32a) 또는 고체함침미러(SIM : Solid Immersion Mirror)(32b)가 사용되는 것이 일반적이다.The slider 30 includes a small lens 32 mounted to be spaced apart from the objective lens 31 by a predetermined focal length, and a main body portion 33 for fixing the lens. It is common to use a solid immersion lens (SIL) 32a or a solid immersion mirror (SIM) 32b.
그런데, 상기와 같은 구조를 취하는 슬라이더가 장착되는 종래의 근접장 광기록재생장치에 있어서는 다음과 같은 점이 문제점으로 지적되어 왔다.However, in the conventional near field optical recording and reproducing apparatus equipped with the slider having the above structure, the following has been pointed out as a problem.
첫째, 근접장 광기록장치의 슬라이더는 근접장광을 기록에 사용하도록 근접장광학계와 기록매체 사이의 간격이 빛의 파장에 수분의 1의 범위 내에 근접하여야하므로 마찰의 문제가 제기되고, 기록 및 재생 과정에서 광의 집속에 의해 기록매체 표면은 온도가 상승하므로 내열성의 문제가 대두된다.First, the slider of the near field optical recording device has a friction problem because the distance between the near field optical system and the recording medium has to be close to the wavelength of light in the range of 1 to use the near field light for recording. The temperature of the surface of the recording medium increases due to the focusing of the light, which leads to a problem of heat resistance.
따라서, 슬라이더는 마찰 및 고온에 강한 재질로서 형성되어야 하며, 일반적으로 실리콘계 재료가 사용되는데, 이러한 재료는 강성이 우수하므로 소정의 형상으로 가공하기가 어렵고, 더구나 대물렌즈와 소형렌즈는 그 광축이 정확히 일치하여야 하므로, 이러한 조건을 만족하면서 상기와 같은 형상 및 구조의 슬라이더를 제작하기에는 수고와 비용 손실이 막대하다.Therefore, the slider should be formed as a material resistant to friction and high temperature, and generally a silicon-based material is used. Since the material is excellent in rigidity, it is difficult to process into a predetermined shape. Moreover, the optical axis of the objective lens and the small lens is precisely Since it is necessary to meet these conditions, it is very laborious and costly to manufacture the slider having the above-described shape and structure.
둘째, 슬라이더는 기록매체의 표면을 매우 근접하여 구동하므로 그 바닥면은 편평한 구조를 취하여야 하고, 따라서 제작시 바닥면의 연마공정이 필요하다.Secondly, since the slider drives the surface of the recording medium very close, its bottom surface should have a flat structure, and therefore, the polishing of the bottom surface is required during manufacturing.
그런데, 종래의 슬라이더 구조에 있어서는 그 바닥면에 소형렌즈가 직접 노출되는 구조를 취하므로, 연마작업이 어렵고, 더구나 소형렌즈의 일부가 연마에 의해 절삭될 경우 초점거리가 달라지게 되므로 매우 섬세한 주의를 요할 수 밖에 없다.However, the conventional slider structure has a structure in which a small lens is directly exposed to the bottom surface thereof, so that polishing is difficult, and moreover, since a focal length is changed when a part of the small lens is cut by polishing, very careful attention is required. It must cost.
세째, 슬라이더 본체부에 소형렌즈를 접착하는 작업에 있어서는, 종래의 슬라이더가 상기와 같은 구조를 취하는 이상, 소형렌즈(32)와 본체부(33) 사이의 홈부(34)에 본드를 주입하는 방식을 채택할 수 밖에 없는데, 이 경우 여분의 본드가 모세관 현상에 의해 소형렌즈(32)의 상부로 불균일하게 확산되므로, 렌즈의 투과도 저하 및 불량을 초래한다.Third, in the operation of adhering the small lens to the slider main body, a method of injecting a bond into the groove 34 between the small lens 32 and the main body 33, as long as the conventional slider has the above structure. In this case, since the extra bond is unevenly spread to the upper portion of the small lens 32 by the capillary phenomenon, the transmittance of the lens is reduced and the defect is caused.
본 발명은 상기와 같은 문제점을 해결하여, 바닥면의 연마 기타 가공 및 렌즈와 본체부의 접착 등 제조상의 곤란함을 해소할 수 있는 구조의 슬라이더를 구비한 근접장 광기록재생장치 및 그 제조방법을 제공하는 것을 그 목적으로 한다.The present invention solves the above problems, and provides a near field optical recording and reproducing apparatus having a slider having a structure that can solve manufacturing difficulties such as polishing the bottom surface and processing the lens and the body. It is for that purpose.
도 1 내지 도 3은 종래의 근접장 광기록재생장치의 구조를 도시한 것으로서,1 to 3 show the structure of a conventional near field optical recording and reproducing apparatus,
도 1은 평면도1 is a plan view
도 2는 고체함침렌즈가 장착된 슬라이더부의 확대단면도Figure 2 is an enlarged cross-sectional view of the slider portion mounted with a solid impregnation lens
도 3은 고체함침미러가 장착된 슬라이더부의 확대단면도Figure 3 is an enlarged cross-sectional view of the slider portion equipped with a solid impregnation mirror
도 4 내지 도 7은 본 발명의 실시례의 구조에 관하여 도시한 것으로서,4 to 7 illustrate the structure of an embodiment of the present invention.
도 4는 고체함침렌즈가 장착된 슬라이더부의 확대단면도Figure 4 is an enlarged cross-sectional view of the slider portion mounted with a solid impregnation lens
도 5은 고체함침미러가 장착된 슬라이더부의 확대단면도5 is an enlarged cross-sectional view of a slider unit equipped with a solid impregnation mirror;
도 6은 바닥판과 투광부가 조립되는 상태를 도시한 평면도 및 측면도6 is a plan view and a side view illustrating a state in which the bottom plate and the light transmitting unit are assembled;
도 7은 바닥판, 투광부 및 소형렌즈가 조립된 상태를 도시한 평면도 및 측면도7 is a plan view and a side view showing a state in which the bottom plate, the light transmitting portion, and the small lens are assembled;
** 도면의 주요부분에 대한 부호의 설명 **** Explanation of symbols for main parts of drawings **
100 : 슬라이더 110 : 바닥판100: slider 110: bottom plate
120 : 투광부 130 : 소형렌즈120: projection unit 130: small lens
130a : 고체함침렌즈(SIL) 130b : 고체함침미러(SIM)130a: solid impregnated lens (SIL) 130b: solid impregnated mirror (SIM)
140 : 대물렌즈 150 : 렌즈 고정부140: objective lens 150: lens fixing portion
본 발명은 상술한 바와 같은 목적을 달성하기 위하여, 기록매체 표면에 근접하여 대향되는 대향렌즈를 탑재하는 슬라이더를 포함하여 구성되고, 상기 기록매체에 근접장광을 입사시켜 정보를 기록 또는 재생하는 근접장 광기록재생장치에 있어서, 상기 슬라이더는 관통공이 형성된 바닥판과; 상기 바닥판의 관통공에 삽입되고, 그 바닥판과 일체를 이루어 바닥면이 편평하도록 상기 렌즈와 동일한 재질에 의해 형성된 투광부와; 상기 투광부의 상부에 장착된 소형렌즈와; 상기 소형렌즈의 상측에 소정의 초점거리를 유지하도록 장착된 대물렌즈와; 상기 소형렌즈 및 대물렌즈를 고정하도록 상기 바닥판 위에 장착된 렌즈 고정부를; 포함하여 구성된 것을 특징으로 하는 근접장 광기록재생장치를 제시한다.In order to achieve the above object, the present invention comprises a slider for mounting an opposing lens that is opposed to a surface of a recording medium, the near field light for recording or reproducing information by injecting near field light into the recording medium. A recording / playback apparatus comprising: a bottom plate having a through hole formed therein; A light-transmitting part inserted into a through hole of the bottom plate and formed of the same material as the lens so as to be integral with the bottom plate and to have a flat bottom surface; A small lens mounted on the light transmitting part; An objective lens mounted on the image side of the small lens to maintain a predetermined focal length; A lens fixing part mounted on the bottom plate to fix the small lens and the objective lens; The present invention provides a near field optical recording and reproducing apparatus.
또한, 상기 바닥판의 관통공은 그 바닥판의 일측변에 ㄷ자 형상으로 형성되고, 상기 투광부는 장방형 구조로서 상기 관통공에 삽입되는 구조를 취하는 것이 바람직하다.In addition, the through hole of the bottom plate is formed in a U-shape on one side of the bottom plate, it is preferable that the light-transmitting portion has a rectangular structure to be inserted into the through hole.
또한, 상기 소형렌즈는 고체함침렌즈 또는 고체함침미러로서, 그 하부가 상기 바닥판의 두께만큼 절삭되는 구조를 취하는 것이 바람직하다.In addition, the compact lens is a solid impregnation lens or a solid impregnation mirror, it is preferable to take a structure that the lower portion is cut by the thickness of the bottom plate.
한편, 본 발명은 상기 목적을 달성하기 위한 또 다른 방안으로서, 기록매체 표면에 근접하여 대향되는 대향렌즈를 탑재하는 슬라이더를 포함하여 구성되고, 상기 기록매체에 근접장광을 입사시켜 정보를 기록 또는 재생하는 근접장 광기록재생장치의 제조방법에 있어서, 바닥판의 일측변에 ㄷ자 형상의 관통공을 형성하는 단계와; 상기 관통공에 상기 렌즈와 동일한 재질에 의해 형성된 투광부를 삽입하는 단계와; 상기 투광부와 일체로 결합된 바닥판의 상하면을 편평하게 연마하는 단계와; 상기 투광부의 상부에 접착제를 도포하는 단계와; 소형렌즈의 하부를 상기 바닥판의 두께만큼 절삭하는 단계와; 상기 접착제의 도포부 위에 상기 소형렌즈를 장착하는 단계와; 상기 소형렌즈의 상측에 소정의 초점거리를 유지하도록 대물렌즈를 배치하는 단계와; 상기 대물렌즈를 고정하도록 상기 바닥판 위에 렌즈 고정부를 설치하는 단계와; 상기에 의해 제조된 슬라이더를 광기록재생장치의 아암에 장착하는 단계를; 포함하여 구성된 근접장 광기록재생장치의 제조방법을 제시한다.On the other hand, the present invention is another method for achieving the above object, comprising a slider for mounting the opposing lens in close proximity to the surface of the recording medium, to record or reproduce information by injecting near-field light on the recording medium; A method of manufacturing a near field optical recording and reproducing apparatus, the method comprising: forming a U-shaped through hole at one side of a bottom plate; Inserting a light transmitting part formed of the same material as the lens into the through hole; Flattening the upper and lower surfaces of the bottom plate integrally coupled with the light transmitting part; Applying an adhesive on the light transmitting part; Cutting a lower portion of the small lens by the thickness of the bottom plate; Mounting the small lens on an application portion of the adhesive; Arranging an objective lens to maintain a predetermined focal length on an image side of the small lens; Installing a lens fixing part on the bottom plate to fix the objective lens; Mounting the slider produced by the above to an arm of the optical recording / reproducing apparatus; A method of manufacturing a near field optical recording and reproducing apparatus including the present invention is provided.
여기서, 상기 소형렌즈는 고체함침렌즈 또는 고체함침미러인 것이 바람직하다.Here, the small lens is preferably a solid impregnation lens or a solid impregnation mirror.
이하, 첨부도면을 참조하여 본 발명의 바람직한 실시례에 관하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.
도 4 내지 도 7은 본 발명의 실시례의 구조에 관하여 도시한 것으로서, 도 4는 고체함침렌즈가 장착된 슬라이더부의 확대단면도, 도 5은 고체함침미러가 장착된 슬라이더부의 확대단면도, 도 6은 바닥판과 투광부가 조립되는 상태를 도시한 평면도 및 측면도, 도 7은 바닥판, 투광부 및 소형렌즈가 조립된 상태를 도시한 평면도 및 측면도이다.4 to 7 are views showing the structure of the embodiment of the present invention, Figure 4 is an enlarged cross-sectional view of the slider portion mounted with a solid impregnation lens, Figure 5 is an enlarged cross-sectional view of a slider portion mounted with a solid impregnation mirror, Figure 6 FIG. 7 is a plan view and a side view showing a state in which the bottom plate and a light transmitting unit are assembled, and FIG. 7 is a plan view and a side view showing a state in which the bottom plate, a light transmitting unit and a small lens are assembled.
도시된 바와 같이, 본 발명에 의한 슬라이더(100)는 관통공(111)이 형성된 바닥판(110)과; 바닥판(110)의 관통공(111)에 삽입되고, 그 바닥판(110)과 일체를이루어 바닥면이 편평하도록 상기 렌즈와 동일한 재질에 의해 형성된 투광부(120)와; 투광부(120)의 상부에 장착된 소형렌즈(130)와; 소형렌즈(130)의 상측에 소정의 초점거리를 유지하도록 장착된 대물렌즈(140)와; 소형렌즈(130) 및 대물렌즈 (140)를 고정하도록 바닥판(110) 위에 장착된 렌즈 고정부(150)를; 포함하여 구성된다.As shown, the slider 100 according to the present invention includes a bottom plate 110 formed with a through hole 111; A light transmitting part 120 inserted into the through hole 111 of the bottom plate 110 and formed of the same material as the lens so as to be integral with the bottom plate 110 so that the bottom surface is flat; A small lens 130 mounted on the light transmitting part 120; An objective lens 140 mounted on the image side of the small lens 130 to maintain a predetermined focal length; A lens fixing part 150 mounted on the bottom plate 110 to fix the small lens 130 and the objective lens 140; It is configured to include.
여기서, 바닥판(110)의 관통공(111)은 그 바닥판(110)의 일측변에 ㄷ자 형상으로 형성되고, 투광부(120)는 장방형 구조로서 상기 관통공(111)에 삽입된다.Here, the through hole 111 of the bottom plate 110 is formed in a c-shape on one side of the bottom plate 110, the light transmitting portion 120 is inserted into the through hole 111 as a rectangular structure.
상기 소형렌즈(130)에는 고체함침렌즈(SIL)를 사용할 수도 있고, 고체함침미러(SIM)를 사용할 수도 있는데, 본 발명에 의한 슬라이더는 소형렌즈(130)의 하측에 소정 두께(d)를 갖는 바닥판(110)의 투광부(111)가 설치되므로 그 구조에 있어서 다소의 변형이 필요하다.Solid lens impregnation lens (SIL) may be used for the small lens (130), or a solid impregnation mirror (SIM) may be used. The slider according to the present invention has a predetermined thickness (d) below the small lens (130). Since the light transmitting portion 111 of the bottom plate 110 is provided, some modification is necessary in the structure.
즉, 소형렌즈(130)와 기록매체 사이에 소정의 초점거리를 유지하기 위해서는, 도 2 및 도 3에 도시된 종래의 구조에 있어서의 렌즈의 깊이(H1,H3)와 도 4 및 도 5에 도시된 본 발명에 의한 구조에 있어서의 렌즈의 깊이(H2,H4)가 같아야 하므로, 본 발명에 사용되는 렌즈의 하부는 바닥판(110)의 두께(d)만큼 절삭되는 것이 바람직하다.That is, in order to maintain a predetermined focal length between the small lens 130 and the recording medium, the depths H1 and H3 of the lens in the conventional structure shown in Figs. Since the depths H2 and H4 of the lenses in the illustrated structure of the present invention should be the same, the lower portion of the lens used in the present invention is preferably cut by the thickness d of the bottom plate 110.
이하, 본 발명에 의한 광기록재생장치에 있어서 슬라이더의 제조방법에 관하여 설명한다.Hereinafter, a method of manufacturing a slider in the optical recording and reproducing apparatus according to the present invention will be described.
우선, 도 6에 도시된 바와 같이, 바닥판(110)의 일측변에 ㄷ자 형상의 관통공(111)을 형성한다. 상술한 바와 같이, 슬라이더의 바닥판(110)은 강성 및 내열성이 매우 강한 재질(예컨데, 세라믹)에 의해 이루어져야 하는데, 이러한 재질은 원형 형상 등으로의 가공은 어려우나, 각진 형상으로의 가공은 용이하므로, 제조상 유리한 구조를 취하는 것으로 볼 수 있다.First, as shown in FIG. 6, a through hole 111 having a C shape is formed at one side of the bottom plate 110. As described above, the bottom plate 110 of the slider should be made of a material having a very strong rigidity and heat resistance (for example, ceramic), but such a material is difficult to be processed into a circular shape, but is easy to be processed into an angular shape. It can be seen that it takes an advantageous structure in manufacturing.
관통공(111)에 상기 렌즈와 동일한 재질에 의해 형성된 투광부(120)를 삽입하고, 기록매체와의 마찰을 최소화하기 위하여 투광부(120)와 일체로 결합된 바닥판(110)의 상하면을 편평하게 연마한다.Inserting the light transmitting portion 120 formed of the same material as the lens into the through hole 111, and the upper and lower surfaces of the bottom plate 110 integrally coupled with the light transmitting portion 120 in order to minimize friction with the recording medium. Polish evenly.
종래의 경우는 바닥면에 소형렌즈가 직접 노출되는 구조를 취하므로, 연마작업이 어렵고, 더구나 소형렌즈의 일부가 연마에 의해 절삭될 경우 초점거리가 달라지게 되므로 매우 섬세한 주의를 요할 수 밖에 없다는 문제점이 있었으나, 본 발명의 경우는 바닥판(110)과 일체로 형성된 투광부(120)를 포함하는 바닥면을 그대로 연마하고, 이후 투광부(120) 상면에 소형렌즈(130)를 장착하는 구조를 취하므로, 제조상의 수고가 경감된다.In the conventional case, since a small lens is directly exposed to the bottom surface, polishing is difficult. Furthermore, when a part of the small lens is cut by polishing, the focal length is changed, requiring very careful attention. However, in the present invention, the bottom surface including the light transmitting part 120 formed integrally with the bottom plate 110 is polished as it is, and then the structure for mounting the small lens 130 on the top surface of the light transmitting part 120 is provided. As a result, manufacturing effort is reduced.
투광부(120)의 상부에 접착제를 도포하고, 소형렌즈(130)의 하부를 바닥판 (110)의 두께(d)만큼 절삭한 후, 상기 접착제의 도포부 위에 소형렌즈(130)를 장착한다.The adhesive is applied to the upper part of the light transmitting part 120, the lower part of the small lens 130 is cut by the thickness d of the bottom plate 110, and then the small lens 130 is mounted on the application part of the adhesive. .
여기서, 소형렌즈(130)로서는 고체함침렌즈(SIL:130a)를 사용할 수도 있고, 고체함침미러(SIM:130b)를 사용할 수도 있다.Here, as the small lens 130, a solid impregnation lens (SIL: 130a) may be used, or a solid impregnation mirror (SIM: 130b) may be used.
또한, 상술한 바와 같이, 종래의 경우는 도 2 및 도 3에 도시된 바와 같이, 소형렌즈(32)와 본체부(33) 사이의 홈부(34)에 본드를 주입하는 방식을 채택하여, 여분의 본드가 모세관 현상에 의해 소형렌즈(32)의 상부로 불균일하게 확산되므로,렌즈의 투과도 저하 및 불량을 초래한다는 문제점이 있었으나, 본 발명의 경우는 모두 편평한 구조를 취하는 렌즈의 하면과 투광부의 상면에 접착제가 균일하게 확산되므로, 상기와 같은 문제점을 해소할 수 있는 것이다.In addition, as described above, in the conventional case, as shown in FIGS. 2 and 3, a method of injecting a bond into the groove 34 between the small lens 32 and the main body 33 is adopted. Due to the non-uniform diffusion of the bond into the upper portion of the small lens 32 due to the capillary phenomenon, there is a problem that the transmittance of the lens is reduced and poor, but in the case of the present invention, both of the lower surface of the lens having a flat structure and the upper surface of the light emitting portion Since the adhesive is uniformly diffused, it is possible to solve the above problems.
이후, 소형렌즈(130)의 상측에 소정의 초점거리를 유지하도록 대물렌즈(140)를 배치하고, 대물렌즈(140)를 고정하도록 바닥판(110) 위에 렌즈 고정부(150)를 설치함으로써 슬라이더(100)의 제조가 완료되며, 이를 종래의 경우와 동일한 구조를 갖는 광기록재생장치의 본체에 장착함으로써, 본 발명에 의한 광기록재생장치의 제조가 완료된다.Thereafter, the objective lens 140 is disposed on the upper side of the small lens 130, and the lens fixing part 150 is installed on the bottom plate 110 to fix the objective lens 140. The manufacture of the 100 is completed, and by attaching it to the main body of the optical recording and reproducing apparatus having the same structure as in the conventional case, the manufacturing of the optical recording and reproducing apparatus according to the present invention is completed.
본 발명은 바닥면의 연마 기타 가공 및 렌즈와 본체부의 접착 등 제조상의 곤란함을 해소할 수 있는 구조의 슬라이더를 구비한 근접장 광기록재생장치 및 그 제조방법을 제공한다.The present invention provides a near field optical recording / reproducing apparatus having a slider having a structure that can solve manufacturing difficulties such as polishing of the bottom surface and adhesion to the lens and the main body, and a manufacturing method thereof.
Claims (7)
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| KR100455122B1 (en) * | 2002-08-13 | 2004-11-06 | 엘지전자 주식회사 | Apparatus for focusing servo |
| KR100735110B1 (en) * | 2006-01-09 | 2007-07-06 | 엘지전자 주식회사 | Lens assembly constructing metohd for near field recording |
| KR101034680B1 (en) * | 2010-12-07 | 2011-05-16 | 이종용 | Separable hot water device |
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| JPS60173730A (en) * | 1985-01-25 | 1985-09-07 | Hitachi Ltd | Optical head device |
| JPH01162239A (en) * | 1987-12-18 | 1989-06-26 | Matsushita Electric Ind Co Ltd | Optical pickup |
| JPH0461634A (en) * | 1990-06-27 | 1992-02-27 | Nec Corp | Optical head |
| JPH05258336A (en) * | 1992-03-11 | 1993-10-08 | Fujitsu Ltd | Objective lens for optical head |
| JPH0676333A (en) * | 1992-08-25 | 1994-03-18 | Mitsubishi Electric Corp | Dust guard for objective lens of optical disk |
| JP3253558B2 (en) * | 1997-05-19 | 2002-02-04 | 株式会社三協精機製作所 | Objective lens drive |
| JPH11203711A (en) * | 1998-01-08 | 1999-07-30 | Canon Inc | Optical system having large numerical aperture and optical information recording and reproducing device using same |
| JP3442296B2 (en) * | 1998-10-16 | 2003-09-02 | シャープ株式会社 | Magneto-optical head device and recording / reproducing device |
| JP2000131508A (en) * | 1998-10-26 | 2000-05-12 | Sony Corp | Objective lens and its manufacture |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100455122B1 (en) * | 2002-08-13 | 2004-11-06 | 엘지전자 주식회사 | Apparatus for focusing servo |
| KR100735110B1 (en) * | 2006-01-09 | 2007-07-06 | 엘지전자 주식회사 | Lens assembly constructing metohd for near field recording |
| KR101034680B1 (en) * | 2010-12-07 | 2011-05-16 | 이종용 | Separable hot water device |
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