KR101024094B1 - Optical pickup equipment for blu ray - Google Patents

Optical pickup equipment for blu ray Download PDF

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Publication number
KR101024094B1
KR101024094B1 KR1020090043177A KR20090043177A KR101024094B1 KR 101024094 B1 KR101024094 B1 KR 101024094B1 KR 1020090043177 A KR1020090043177 A KR 1020090043177A KR 20090043177 A KR20090043177 A KR 20090043177A KR 101024094 B1 KR101024094 B1 KR 101024094B1
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South Korea
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objective lens
dvd
lens
bridge
optical pickup
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KR1020090043177A
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Korean (ko)
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KR20100124100A (en
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이주형
김종렬
전재선
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(주)옵티스
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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
    • G11B7/0933—Details of stationary parts
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0925—Electromechanical actuators for lens positioning
    • G11B7/0935—Details of the moving parts
    • 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
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/127—Lasers; Multiple laser arrays
    • G11B7/1275—Two or more lasers having different wavelengths
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1372—Lenses
    • G11B7/1374—Objective lenses
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—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
    • 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
    • G11B2220/2541—Blu-ray discs; Blue laser DVR discs

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)

Abstract

본 발명은 블루레이용 광픽업장치에 관한 것으로, 중심부에 대물렌즈가 안착되는 렌즈홀더가 구비되고, 이 렌즈홀더에 각각의 BD 대물렌즈와 DVD/CD 대물렌즈가 삽입되는 블루레이용 광픽업장치에 있어서, BD 대물렌즈와 DVD/CD 대물렌즈를 한번에 사출성형할 수 있도록, BD 대물렌즈와 DVD/CD 대물렌즈는 브릿지부에 의해 일체로 연결되어 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical pickup device for Blu-ray, comprising: a lens holder in which an objective lens is mounted at a center thereof, and each BD objective lens and a DVD / CD objective lens are inserted into the lens holder. In the present invention, the BD objective lens and the DVD / CD objective lens are integrally connected by a bridge portion so that the BD objective lens and the DVD / CD objective lens can be injection molded at one time.

따라서, BD 대물렌즈와 DVD/CD 대물렌즈가 브릿지부에 의해 일체로 구비되므로 한번의 사출성형 공정으로 BD 대물렌즈와 DVD/CD 대물렌즈가 동시에 성형되고, 사출성형 공정이 감소되며, 조립공수가 감소된다.Therefore, since the BD objective lens and the DVD / CD objective lens are integrally provided by the bridge part, the BD objective lens and the DVD / CD objective lens are simultaneously formed in one injection molding process, the injection molding process is reduced, and the assembly labor is reduced. do.

BD 대물렌즈, DVD/CD 대물렌즈, 브릿지부, 렌즈홀더, 브릿지홈 BD objective lens, DVD / CD objective lens, bridge part, lens holder, bridge groove

Description

블루레이용 광픽업장치{Optical pickup equipment for blu ray}Optical pickup equipment for blu ray

본 발명은 블루레이용 광픽업장치에 관한 것으로, 더 상세하게는 BD 대물렌즈와 DVD/CD 대물렌즈를 한번에 사출성형할 수 있고, BD 대물렌즈와 DVD/CD 대물렌즈가 렌즈홀더에 한번에 안착되는 블루레이용 광픽업장치에 관한 것이다.The present invention relates to an optical pickup device for Blu-ray, and more particularly, it is possible to injection molding a BD objective lens and a DVD / CD objective lens at a time, and the BD objective lens and the DVD / CD objective lens are mounted on the lens holder at once. An optical pickup device for a Blu-ray.

정보화가 급속하게 진전됨에 따라 자료의 종류와 용량이 크게 증가하면서 컴퓨터 사용자들이 자료를 저장하고 관리할 때 사용하는 정보저장장치의 중요성이 점차 커지고 있다. With the rapid progress of informatization, the type and capacity of data has increased greatly, and the importance of information storage devices used by computer users to store and manage data is increasing.

이에 대용량 저장매체의 개발이 점차 요구되고 있으며,이런 필요성에 의해 만들어진 것이 블루레이 디스크(blu ray disk; 이하, 'BD'라고 칭한다.)이고, 이를 사용하기 위해서는 옵티칼 디스크 드라이브(optical disc drive; ODD)를 비롯 핵심부품인 광픽업헤드의 개발이 같이 이루어져야 한다.Accordingly, development of mass storage media is increasingly required, and the necessity of this is blu ray disk (hereinafter referred to as 'BD'), and an optical disc drive (ODD) is required to use it. ), And the optical pickup head, which is a core part, should be developed together.

초대형 블록버스터 영화, 대규모 스포츠 이벤트가 시선을 끌면서 DVD만으로 만족을 못하는 이들이 많아지면서 점차 블루레이 디스크가 차세대 광기기 시장에서의 주류로 부상하고 있다.Blu-ray discs are becoming the mainstream in the next-generation optical device market, as large blockbuster movies and large-scale sporting events catch the eye and many people are not satisfied with DVD alone.

BD는 종전에 비해 5배 가량 저장용량을 늘려 25GB까지 수록할 수 있으며, DVD/CD는 적색레이저를 광원으로 사용하고 있는데 반해, 블루레이 디스크는 405nm의 청자색레이저를 사용해서 기록밀도를 올린 것이 특징이다.BD can store up to 25GB of storage capacity by 5 times compared to the past, while DVD / CD uses red laser as light source, while Blu-ray disc uses 405nm blue violet laser to increase recording density. to be.

또, 청자색 파장으로의 광원의 변화뿐 아니라, 고개구수(numerical aperture; NA)의 대물렌즈(objective lens; OL)를 사용하여 집광빔의 사이즈를 줄여 기록밀도를 높였다. 디스크 포맷과 기록용량이 다른 DVD(digital video disk)/CD(compact disc)의 호환을 위해서는 결국 DVD/CD용 호환 대물렌즈를 사용하고, 더불어 블루레이 디스크용 고개구수의 대물렌즈를 별도로 사용하여 2매 대물렌즈로 개발하는 것이 정례화되어 있다.In addition to the change of the light source to the blue-violet wavelength, an objective lens (OL) of high numerical aperture (NA) was used to reduce the size of the condensing beam to increase the recording density. For compatibility with digital video disks (CDs) and compact discs (CDs) with different disc formats and recording capacities, use compatible objectives for DVDs / CDs, and separate high-volume objectives for Blu-ray discs. Developing with every objective is routine.

현재의 기술로는 블루레이 디스크, DVD/CD 각각의 개구수(NA)와 파장을 모두 호환하는 기술은 실현되지 않고 있는 것이다.In the current technology, a technology that is compatible with both the numerical aperture (NA) and the wavelength of each of the Blu-ray Disc and DVD / CD has not been realized.

기존 DVD/CDOL은 호환형 렌즈 방식으로 1매로 DVD/CD 파장(655nm/785nm)을 모두 대응한다. The existing DVD / CDOL is a compatible lens type and supports all DVD / CD wavelengths (655nm / 785nm) in one sheet.

BD는 개구수(NA)가 높고, 유효초점거리(effective focal length; EFL)가 매우 짧아, DVD/CD/BD 3파장을 대응하기가 현실적으로 어렵다. 더욱이 BD 대물렌즈는 파장에 따른 색수차/구면수차의 발생이 심해 기존에는 정밀도와 온도변화에 장점이 있는 유리 재질의 대물렌즈를 사용했다. 하지만, 유리 재질의 대물렌즈의 경우, 질량이나 단가의 단점이 커서 최근은 대물렌즈 업체에 의해 플라스틱 재질로 바뀌고 있다.BD has a high numerical aperture (NA), and an effective focal length (EFL) is very short, making it difficult to cope with DVD / CD / BD three wavelengths. In addition, BD objective lens has a lot of chromatic aberration / spherical aberration according to the wavelength, conventionally used a glass objective lens that has advantages in precision and temperature change. However, in the case of a glass objective lens, the disadvantage of mass or unit cost is large, and recently, an objective lens maker has been changed to a plastic material.

도 1은 종래의 BD용 광픽업장치를 보인 개략적 분리 사시도로써, 이는, BD 대물렌즈(1)와 DVD/CD 대물렌즈(2)가 중심부에 취부되고 외주면으로 트랙킹 및 포 커싱을 위한 코일(4)이 권선된 렌즈홀더(lens holder; 3)와, 렌즈홀더(3)의 코일(4)에 대향하여 베이스(base)에 설치된 마그네트(magnet; 5) 및 요크(Yoke; 6)와, 렌즈홀더(3)의 양측면에 일단이 고정되어 이를 지지하는 와이어 서스펜션(wire suspension; 7)과, 렌즈홀더(3)의 일측에 마련되어 와이어 서스펜션(7)의 타단이 고정된 댐퍼홀더(8)로 구성된다.FIG. 1 is a schematic separated perspective view showing a conventional optical pickup device for BD, which is a BD objective lens 1 and a DVD / CD objective lens 2 mounted at the center thereof, and a coil 4 for tracking and focusing on an outer circumferential surface thereof. ) Is a lens holder (3) wound around, a magnet (5) and a yoke (6) and a lens holder (50) mounted on a base opposite to the coil (4) of the lens holder (3); One end is fixed to both sides of the (3) and the wire suspension (wire suspension; 7) and the damper holder (8) is provided on one side of the lens holder (3) is fixed to the other end of the wire suspension (7) .

이러한 광픽업장치는 BD 대물렌즈(1)와 DVD/CD 대물렌즈(2)를 각각 사출성형해야 하므로 사출성형 작업이 증가되고, 사출성형된 BD 대물렌즈(1) 및 DVD/CD 대물렌즈(2)를 렌즈홀더(3)의 두 결합부(3a)(3b)들에 각각 결합해야 하므로 조립공수가 증가된다. 이러한 사출성형 작업의 증가 및 조립공수의 증가는 광픽업장치의 생산성을 저하시키는 요인이 되었다.Since the optical pickup apparatus requires injection molding of the BD objective lens 1 and the DVD / CD objective lens 2, the injection molding operation is increased, and the injection molded BD objective lens 1 and the DVD / CD objective lens 2 ) Must be coupled to the two coupling portions 3a and 3b of the lens holder 3, respectively, thereby increasing the assembly labor. The increase in the injection molding operation and the increase in the number of assembly operations have been a factor in lowering the productivity of the optical pickup apparatus.

상술한 문제점을 해결하기 위한 본 발명의 목적은, BD 대물렌즈와 DVD/CD 대물렌즈를 한번에 사출성형할 수 있도록 한 블루레이용 광픽업장치를 제공하는데 있다.SUMMARY OF THE INVENTION An object of the present invention for solving the above problems is to provide an optical pickup device for Blu-ray which enables injection molding of a BD objective lens and a DVD / CD objective lens at once.

본 발명의 다른 목적은, BD 대물렌즈와 DVD/CD 대물렌즈가 렌즈홀더에 한번에 안착되도록 한 블루레이용 광픽업장치를 제공하는데 있다.Another object of the present invention is to provide an optical pickup device for Blu-ray, in which a BD objective lens and a DVD / CD objective lens are mounted on a lens holder at one time.

본 발명의 또 다른 목적은, BD 대물렌즈, DVD/CD 대물렌즈와 브릿지부의 이음 부분에 응력집중을 분산시키도록 처리된 것을 특징으로 하는 블루레이용 광픽업장치를 제공하는데 있다.It is still another object of the present invention to provide an optical pickup apparatus for a Blu-ray, characterized in that it is processed to disperse stress concentration on the joint part of a BD objective lens, a DVD / CD objective lens, and a bridge portion.

본 발명의 또 다른 목적은, BD 대물렌즈, DVD/CD 대물렌즈, 브릿지부가 렌즈홀더에 안정적으로 안착되도록 한 블루레이용 광픽업장치를 제공하는데 있다. Still another object of the present invention is to provide an optical pickup device for Blu-ray, in which a BD objective lens, a DVD / CD objective lens, and a bridge part are stably seated on a lens holder.

이와 같은 목적을 달성하기 위한 본 발명의 블루레이용 광픽업장치는, 중심부에 두개의 결합부들이 각각 형성되는 렌즈홀더가 구비되고, 이 렌즈홀더의 결합부들에 각각 BD 대물렌즈와 DVD/CD 대물렌즈가 취부되는 블루레이용 광픽업장치에 있어서, BD 대물렌즈와 DVD/CD 대물렌즈를 한번에 사출성형할 수 있도록, BD 대물렌즈와 DVD/CD 대물렌즈는 브릿지부에 의해 일체로 연결되어 있는 것을 특징으로 한다.Blu-ray optical pickup device of the present invention for achieving the above object is provided with a lens holder in which two coupling portions are formed in the center, respectively, the BD objective lens and the DVD / CD objective in each of the coupling portion of the lens holder In a Blu-ray optical pickup apparatus in which a lens is mounted, the BD objective lens and the DVD / CD objective lens are integrally connected by a bridge portion so that the BD objective lens and the DVD / CD objective lens can be injection molded at one time. It features.

본 발명 블루레이용 광픽업장치의 다른 특징은, 렌즈홀더의 두 결합부들은, BD 대물렌즈 및 DVD/CD 대물렌즈를 렌즈홀더의 결합부들에 안착시키면 브릿지부가 안착되면서 BD 대물렌즈, DVD/CD 대물렌즈 및 브릿지부가 한번에 조립되도록, 브릿지홈으로 연결되어 있다.Another feature of the optical pickup device for the Blu-ray of the present invention is that the two coupling parts of the lens holder are mounted on the coupling parts of the BD objective lens and the DVD / CD objective lens while the BD objective lens and the DVD / CD are mounted. It is connected to the bridge groove so that the objective lens and the bridge portion can be assembled at one time.

본 발명 블루레이용 광픽업장치의 또 다른 특징은, BD 대물렌즈, DVD/CD 대물렌즈와 브릿지부의 이음부위는, 노치부가 제거되어서 응력집중을 분산시키도록 라운드 처리된다.Another feature of the optical pickup device for Blu-ray of the present invention is that the BD objective lens, the DVD / CD objective lens and the joint portion of the bridge portion are rounded so that the notch portion is removed to disperse the stress concentration.

본 발명 블루레이용 광픽업장치의 또 다른 특징은, BD 대물렌즈, DVD/CD 대물렌즈 및 브릿지부가 렌즈홀더의 결합부, 브릿지홈에 안착될시 이들 사이의 접촉면적을 증대시키도록, 브릿지부에는 지지구멍이 형성되어 있고, 브릿지홈에는 지지구멍이 삽입되도록 지지돌기가 돌출되어 있다.Another feature of the optical pickup device for the Blu-ray of the present invention is that the BD objective lens, the DVD / CD objective lens and the bridge portion increase the contact area therebetween when they are seated in the coupling portion of the lens holder and the bridge groove. The support hole is formed in this, and the support protrusion protrudes so that a support hole may be inserted in the bridge groove.

이상에서와 같은 본 발명은, BD 대물렌즈와 DVD/CD 대물렌즈가 브릿지부에 의해 일체로 구비되므로 한번의 사출성형 공정으로 BD 대물렌즈와 DVD/CD 대물렌즈가 동시에 성형된다. 따라서 사출성형 공정이 감소되며, 이에 따라 광픽업장치의 제조단가 및 제조시간이 절감된다.In the present invention as described above, since the BD objective lens and the DVD / CD objective lens are integrally provided by the bridge portion, the BD objective lens and the DVD / CD objective lens are simultaneously molded in one injection molding process. Therefore, the injection molding process is reduced, thereby reducing the manufacturing cost and manufacturing time of the optical pickup device.

또한, 렌즈홀더의 결합부들 사이에는 브릿지부가 안착되도록 브릿지홈이 형성되어 있다. 따라서 일체화된 BD 대물렌즈와 DVD/CD 대물렌즈가 렌즈홀더의 결합부들에 안착되면 브릿지부가 브릿지홈에 안착되면서 BD 대물렌즈, DVD/CD 대물렌즈, 브릿지부가 렌즈홀더에 한번에 조립된다. 그러므로 BD 대물렌즈, DVD/CD 대물렌즈가 렌즈홀더에 한번에 조립되므로 조립공수가 감소되며, 이에 따라 광픽업장치 의 전체 제조시간이 절감된다.In addition, a bridge groove is formed between the coupling portions of the lens holder so that the bridge portion is seated. Therefore, when the integrated BD objective lens and the DVD / CD objective lens are seated on the coupling portions of the lens holder, the bridge portion is seated in the bridge groove and the BD objective lens, the DVD / CD objective lens and the bridge portion are assembled to the lens holder at once. Therefore, since the BD objective lens and the DVD / CD objective lens are assembled to the lens holder at one time, the assembly labor is reduced, thereby reducing the overall manufacturing time of the optical pickup device.

BD 대물렌즈, DVD/CD 대물렌즈와 브릿지부의 이음 부분은 집중되는 응력이 분산되도록 라운드 처리되어 있다. 따라서 이음부위가 라운드 처리되므로 노치부가 발생되지 않는다. 그러므로 노치부에 발생되는 응력집중 문제가 해결되며, 결국, 응력집중에 따른 제품의 파손, 뒤틀림 등의 문제가 방지된다.The BD objective lens, the DVD / CD objective lens, and the joint portion of the bridge portion are rounded to disperse the concentrated stress. Therefore, the notch is not generated because the joint is rounded. Therefore, the problem of stress concentration occurring in the notch part is solved, and, as a result, problems such as breakage and warping of the product due to stress concentration are prevented.

BD 대물렌즈, DVD/CD 대물렌즈 및 브릿지부가 렌즈홀더의 결합부, 브릿지홈에 안착될시 이들 사이의 접촉면적을 증대시키도록, BD 대물렌즈, DVD/CD 대물렌즈에 일체로 형성된 브릿지부에는 지지구멍이 형성되어 있고, 렌즈홀더의 브릿지홈에는 지지구멍이 삽입되도록 지지돌기가 돌출되어 있다. 따라서 BD 대물렌즈, DVD/CD 대물렌즈 및 브릿지부가 렌즈홀더의 결합부, 브릿지홈에 안착될시 이들 사이의 접촉면적이 증대된다. 그러므로 BD 대물렌즈, DVD/CD 대물렌즈, 브릿지부가 렌즈홀더에 안정적으로 안착될 뿐 아니라, 외부의 충격에도 BD 대물렌즈, DVD/CD 대물렌즈가 심하게 유동되지 않는다.When the BD objective lens, the DVD / CD objective lens, and the bridge portion are integrally formed on the BD objective lens and the DVD / CD objective lens so as to increase the contact area therebetween when they are seated in the coupling portion and the bridge groove of the lens holder. The support hole is formed, and the support protrusion protrudes so that the support hole is inserted into the bridge groove of the lens holder. Therefore, when the BD objective lens, the DVD / CD objective lens and the bridge portion are seated in the coupling portion and the bridge groove of the lens holder, the contact area therebetween is increased. Therefore, not only the BD objective lens, the DVD / CD objective lens and the bridge portion are stably seated on the lens holder, but also the BD objective lens and the DVD / CD objective lens are not severely flowed by external impact.

본 발명의 구체적인 특징 및 이점은 첨부된 도면을 참조한 이하의 설명으로 더욱 명확해 질 것이다.Specific features and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings.

도 2는 본 발명의 블루레이용 광픽업장치를 보인 개략적 분리 사시도로써, 이는, BD 대물렌즈(10)와 DVD/CD 대물렌즈(11)가 중심부에 취부되고 외주면으로 트랙킹 및 포커싱을 위한 코일(17)이 권선된 렌즈홀더(13)와, 렌즈홀더(13)의 코일(17)에 대향하여 베이스에 설치된 마그네트(18) 및 요크(19)와, 렌즈홀더(13)의 양측면에 일단이 고정되어 이를 지지하는 와이어 서스펜션(20)과, 렌즈홀더(13)의 일측에 마련되어 와이어 서스펜션(20)의 타단이 고정된 댐퍼홀더(21)로 구성된다.FIG. 2 is a schematic separated perspective view showing an optical pickup device for a Blu-ray according to the present invention, which includes a BD objective lens 10 and a DVD / CD objective lens 11 mounted at a center thereof and a coil for tracking and focusing on an outer circumferential surface thereof. One end is fixed to the lens holder 13 on which the 17 is wound, the magnets 18 and the yoke 19 installed on the base, and the opposite sides of the lens holder 13, facing the coil 17 of the lens holder 13. And a wire suspension 20 supporting the same, and a damper holder 21 provided at one side of the lens holder 13 to which the other end of the wire suspension 20 is fixed.

한편, BD 대물렌즈(10)와 DVD/CD 대물렌즈(11)는, 브릿지부(12)에 의해 일체로 연결되어 있다. 따라서 BD 대물렌즈(10)와 DVD/CD 대물렌즈(11)를 한번에 사출성형할 수 있다.On the other hand, the BD objective lens 10 and the DVD / CD objective lens 11 are integrally connected by the bridge portion 12. Therefore, the BD objective lens 10 and the DVD / CD objective lens 11 can be injection molded.

렌즈홀더(13)의 두 결합부(14)(15)들 사이에는 브릿지부(12)가 안착되도록 브릿지홈(16)이 형성되어 있다. 따라서 BD 대물렌즈(10) 및 DVD/CD 대물렌즈(11)를 렌즈홀더(13)의 결합부(14)(15)들에 안착시키면 브릿지부(12)가 안착되면서 BD 대물렌즈(10), DVD/CD 대물렌즈(11) 및 브릿지부(12)가 한번에 조립된다.A bridge groove 16 is formed between the two coupling parts 14 and 15 of the lens holder 13 so that the bridge part 12 is seated. Accordingly, when the BD objective lens 10 and the DVD / CD objective lens 11 are seated on the coupling portions 14 and 15 of the lens holder 13, the bridge portion 12 is seated and the BD objective lens 10, The DVD / CD objective lens 11 and the bridge portion 12 are assembled at one time.

이러한 본 발명의 블루레이용 광픽업장치는, BD 대물렌즈(10)와 DVD/CD 대물렌즈(11)가 브릿지부(12)에 의해 일체로 구비되므로 한번의 사출성형 공정으로 BD 대물렌즈(10)와 DVD/CD 대물렌즈(11)가 동시에 성형된다. 따라서 사출성형 공정이 감소되며, 이에 따라 광픽업장치의 제조단가 및 제조시간이 절감된다.In the optical pickup device for Blu-ray of the present invention, since the BD objective lens 10 and the DVD / CD objective lens 11 are integrally provided by the bridge portion 12, the BD objective lens 10 is processed in one injection molding process. ) And the DVD / CD objective lens 11 are molded at the same time. Therefore, the injection molding process is reduced, thereby reducing the manufacturing cost and manufacturing time of the optical pickup device.

또한, 렌즈홀더(13)의 결합부(14)(15)들 사이에는 브릿지부(12)가 안착되도록 브릿지홈(16)이 형성되어 있다. 따라서 일체화된 BD 대물렌즈(10)와 DVD/CD 대물렌즈(11)가 렌즈홀더(13)의 결합부(14)(15)들에 안착되면 브릿지부(12)가 브릿지홈(16)에 안착되면서 BD 대물렌즈(10), DVD/CD 대물렌즈(11), 브릿지부(12)가 렌즈홀더(13)에 한번에 조립된다. In addition, a bridge groove 16 is formed between the coupling portions 14 and 15 of the lens holder 13 so that the bridge portion 12 is seated. Accordingly, when the integrated BD objective lens 10 and the DVD / CD objective lens 11 are seated on the coupling portions 14 and 15 of the lens holder 13, the bridge portion 12 is seated on the bridge groove 16. The BD objective lens 10, the DVD / CD objective lens 11, and the bridge portion 12 are assembled to the lens holder 13 at one time.

그러므로 BD 대물렌즈(10), DVD/CD 대물렌즈(11)가 렌즈홀더(13)에 한번에 조립되므로 조립공수가 감소되며, 이에 따라 광픽업장치의 전체 제조시간이 절감된 다.Therefore, since the BD objective lens 10 and the DVD / CD objective lens 11 are assembled to the lens holder 13 at one time, the assembly labor is reduced, thereby reducing the overall manufacturing time of the optical pickup apparatus.

도 3은 본 발명 블루레이용 광픽업장치의 다른 실시예를 보인 개략적 분리 사시도로써, 이는, BD 대물렌즈(10), DVD/CD 대물렌즈(11)와 브릿지부(12)의 이음부위는, 노치부가 제거되어서 응력집중을 분산시키도록 라운드(22) 처리되어 있다. 렌즈홀더(13)의 두 결합부(14)(15) 사이에 구비된 브릿지홈(16)에는 브릿지부(12)의 라운드(22)에 대응되도록 다른 라운드(23)가 형성되어 있다. 3 is a schematic exploded perspective view showing another embodiment of the optical pickup device for Blu-ray of the present invention, which is a BD objective lens 10, a DVD / CD objective lens 11 and a joint portion of the bridge portion 12, The notches are removed to round 22 to disperse the stress concentration. In the bridge groove 16 provided between the two coupling parts 14 and 15 of the lens holder 13, another round 23 is formed to correspond to the round 22 of the bridge part 12.

이와 같이 BD 대물렌즈(10), DVD/CD 대물렌즈(11)와 브릿지부(12)의 이음 부분에 응력집중을 분산시키도록 라운드(22) 처리되므로 노치부가 발생되지 않고, 이에 따라 노치부에 발생되는 응력집중 문제가 해결되며, 결국, 응력집중에 따른 제품의 파손, 뒤틀림 등의 문제가 방지된다.In this way, since the round 22 is processed to disperse the stress concentration in the joint portions of the BD objective lens 10, the DVD / CD objective lens 11 and the bridge portion 12, the notch portion is not generated. The stress concentration problem that is generated is solved. As a result, problems such as breakage and warping of the product due to stress concentration are prevented.

도 4는 본 발명 블루레이용 광픽업장치의 또 다른 실시예를 보인 개략적 분리 사시도로써, 이는, BD 대물렌즈(10), DVD/CD 대물렌즈(11) 및 브릿지부(12)가 렌즈홀더(13)의 결합부(14)(15)들, 브릿지홈(16)에 안착될시 이들 사이의 접촉면적을 증대시키도록, 브릿지부(12)에는 지지구멍(24)이 형성되어 있고, 브릿지홈(16)에는 지지구멍(24)이 삽입되도록 지지돌기(25)가 돌출되어 있다.4 is a schematic exploded perspective view showing still another embodiment of the optical pickup device for a Blu-ray of the present invention, which is a BD objective lens 10, a DVD / CD objective lens 11 and a bridge portion 12 is a lens holder ( The support portion 24 is formed in the bridge portion 12 so as to increase the contact area therebetween when the coupling portions 14 and 15 and the bridge groove 16 of the 13 are seated. The support protrusion 25 protrudes in the 16 so that the support hole 24 may be inserted.

따라서, BD 대물렌즈(10), DVD/CD 대물렌즈(11) 및 브릿지부(12)가 렌즈홀더(13)의 결합부(14)(15), 브릿지홈(16)에 안착될시 이들 사이의 접촉면적이 증대된다. 그러므로 BD 대물렌즈(10), DVD/CD 대물렌즈(11), 브릿지부(12)가 렌즈홀더(13)에 안정적으로 안착될 뿐 아니라, 외부의 충격에도 BD 대물렌즈(10), DVD/CD 대물렌즈(11)가 심하게 유동되지 않는다.Therefore, when the BD objective lens 10, the DVD / CD objective lens 11 and the bridge portion 12 are seated in the coupling portions 14 and 15 and the bridge groove 16 of the lens holder 13 therebetween. The contact area of is increased. Therefore, not only the BD objective lens 10, the DVD / CD objective lens 11, and the bridge portion 12 are stably seated on the lens holder 13, but also the BD objective lens 10 and DVD / CD are protected against external impact. The objective lens 11 does not flow badly.

도 1은 종래의 블루레이용 광픽업장치를 보인 개략적 분리 사시도Figure 1 is a schematic separation perspective view showing a conventional optical pickup device for Blu-ray

도 2는 본 발명의 블루레이용 광픽업장치를 보인 개략적 분리 사시도Figure 2 is a schematic separation perspective view showing an optical pickup device for a Blu-ray of the present invention

도 3은 본 발명의 다른 실시예를 보인 개략적 분리 사시도3 is a schematic exploded perspective view showing another embodiment of the present invention

도 4는 본 발명의 또 다른 실시예를 보인 개략적 분리 사시도Figure 4 is a schematic exploded perspective view showing another embodiment of the present invention

*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

10 : BD 대물렌즈 11 : DVD/CD 대물렌즈10: BD objective lens 11: DVD / CD objective lens

12 : 브릿지부 13 : 렌즈홀더12: bridge portion 13: lens holder

14,15 : 결합부 16 : 브릿지홈14,15: coupling portion 16: bridge groove

17 : 코일 18 : 마그네트17: coil 18: magnet

19 : 요크 20 : 와이어 서스펜션19: York 20: wire suspension

21 : 댐퍼홀더 22,23 : 라운드21: damper holder 22,23: round

24 : 지지구멍 25 : 지지돌기24: support hole 25: support protrusion

Claims (4)

중심부에 두개의 결합부(14)(15)들이 각각 형성되는 렌즈홀더(13)가 구비되고, 이 렌즈홀더(13)의 결합부들에 각각 BD 대물렌즈(10)와 DVD/CD 대물렌즈(11)가 취부되는 블루레이용 광픽업장치에 있어서,A lens holder 13 having two coupling portions 14 and 15 formed in the center thereof is provided, and the BD objective lens 10 and the DVD / CD objective lens 11 are respectively provided at the coupling portions of the lens holder 13. In the optical pickup device for Blu-ray to be mounted, BD 대물렌즈(10)와 DVD/CD 대물렌즈(11)를 한번에 사출성형할 수 있도록, BD 대물렌즈(10)와 DVD/CD 대물렌즈(11)는 브릿지부(12)에 의해 일체로 연결되되,The BD objective lens 10 and the DVD / CD objective lens 11 are integrally connected by the bridge part 12 so that the BD objective lens 10 and the DVD / CD objective lens 11 can be injection molded at one time. , 브릿지부(12)의 폭은 BD 대물렌즈(10) 및 DVD/CD 대물렌즈(11)의 직경보다 작은 폭으로 형성되어 있고;The width of the bridge portion 12 is smaller than the diameter of the BD objective lens 10 and the DVD / CD objective lens 11; 렌즈홀더(13)의 두 결합부(14)(15)들은 BD 대물렌즈(10) 및 DVD/CD 대물렌즈(11)를 렌즈홀더(13)의 결합부(14)(15)들에 안착시키면 브릿지부(12)가 안착되면서 BD 대물렌즈(10), DVD/CD 대물렌즈(11) 및 브릿지부(12)가 한번에 조립되도록, 브릿지홈(16)으로 연결되어 있으며;When the two coupling parts 14 and 15 of the lens holder 13 mount the BD objective lens 10 and the DVD / CD objective lens 11 to the coupling parts 14 and 15 of the lens holder 13, The bridge portion 12 is connected to the bridge groove 16 so that the BD objective lens 10, the DVD / CD objective lens 11 and the bridge portion 12 are assembled at one time; BD 대물렌즈(10), DVD/CD 대물렌즈(11)와 브릿지부(12)의 오목한 이음부위는, 노치부가 제거되어서 응력집중을 분산시키도록 라운드(22) 처리된 것을 특징으로 하는 블루레이용 광픽업장치.The concave joint portions of the BD objective lens 10, the DVD / CD objective lens 11 and the bridge portion 12 are round 22 processed so that notches are removed to disperse stress concentration. Optical pickup device. 제1항에 있어서,The method of claim 1, BD 대물렌즈(10), DVD/CD 대물렌즈(11) 및 브릿지부(12)가 렌즈홀더(13)의 결합부(14)(15)들, 브릿지홈(16)에 안착될시 이들 사이의 접촉면적을 증대시키도록, 브릿지부(12)에는 지지구멍(24)이 형성되어 있고, 브릿지홈(16)에는 지지구멍(24)이 삽입되도록 지지돌기(25)가 돌출되어 있는 것을 특징으로 하는 블루레이용 광픽업장치.When the BD objective lens 10, the DVD / CD objective lens 11 and the bridge portion 12 are seated in the coupling portions 14 and 15 of the lens holder 13 and the bridge groove 16, In order to increase the contact area, the support portion 24 is formed in the bridge portion 12, and the support protrusion 25 is protruded so that the support hole 24 is inserted in the bridge groove 16. Optical pickup device for Blu-ray. 삭제delete 삭제delete
KR1020090043177A 2009-05-18 2009-05-18 Optical pickup equipment for blu ray KR101024094B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09115170A (en) * 1995-10-18 1997-05-02 Seiko Epson Corp Composite objective lens and optical pickup device
JP2008234738A (en) * 2007-03-19 2008-10-02 Konica Minolta Opto Inc Compound objective lens and optical pickup device
KR20080099114A (en) * 2007-05-08 2008-11-12 소니 가부시끼 가이샤 Objective lens device, optical pickup device, optical-disc driving device and driving method of objective lens

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09115170A (en) * 1995-10-18 1997-05-02 Seiko Epson Corp Composite objective lens and optical pickup device
JP2008234738A (en) * 2007-03-19 2008-10-02 Konica Minolta Opto Inc Compound objective lens and optical pickup device
KR20080099114A (en) * 2007-05-08 2008-11-12 소니 가부시끼 가이샤 Objective lens device, optical pickup device, optical-disc driving device and driving method of objective lens

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