KR970023055A - Optical pickup device - Google Patents

Optical pickup device Download PDF

Info

Publication number
KR970023055A
KR970023055A KR1019950033913A KR19950033913A KR970023055A KR 970023055 A KR970023055 A KR 970023055A KR 1019950033913 A KR1019950033913 A KR 1019950033913A KR 19950033913 A KR19950033913 A KR 19950033913A KR 970023055 A KR970023055 A KR 970023055A
Authority
KR
South Korea
Prior art keywords
light
region
optical pickup
photodetection
divided
Prior art date
Application number
KR1019950033913A
Other languages
Korean (ko)
Other versions
KR100200858B1 (en
Inventor
조건호
김응호
유장훈
임정화
Original Assignee
김광호
삼성전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019950033913A priority Critical patent/KR100200858B1/en
Priority to US08/708,200 priority patent/US5907530A/en
Priority to NL1004079A priority patent/NL1004079C2/en
Priority to IT96MI001992A priority patent/IT1285223B1/en
Priority to FR9611994A priority patent/FR2739717B1/en
Priority to DE19640837A priority patent/DE19640837B4/en
Priority to GB9620677A priority patent/GB2306045B/en
Priority to JP26433996A priority patent/JP3872145B2/en
Publication of KR970023055A publication Critical patent/KR970023055A/en
Application granted granted Critical
Publication of KR100200858B1 publication Critical patent/KR100200858B1/en

Links

Classifications

    • 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
    • G11B7/28—Re-recording, i.e. transcribing information from one optical record carrier on to one or more similar or dissimilar record carriers
    • 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
    • G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
    • 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
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0006—Recording, reproducing or erasing systems characterised by the structure or type of the carrier adapted for scanning different types of carrier, e.g. CD & DVD
    • 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
    • G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
    • G11B7/0909—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only by astigmatic methods

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Glass Compositions (AREA)
  • Holo Graphy (AREA)

Abstract

본 발명은 광 픽업 장치에 관한 것으로서, 특히 두께가 다른 디스크에 대한 정보의 읽기 및 쓰기가 가능한 광 픽업 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical pickup device, and more particularly, to an optical pickup device capable of reading and writing information on discs of different thicknesses.

본 발명의 장치는 광원과; 디스크 면을 향하는 상기 광원으로부터의 광 진행 경로 상에 마련되는 것으로 소정의 유효직경을 가지는 대물 렌즈와; 상기 대물 렌즈와 상기 광원의 사이에 마련되는 광분할소자와; 상기 광분할소자로부터 분할되어 입사되는 것으로 상기 디스크로부터 반사된 광을 검지하는 광 검출기와; 상기 광 검출기를 향하는 광 진행 경로 상에 마련되어 입사광이 근축과 원축 사이 영역의 광을 차단 또는 산란 또는 반사하는 광 제어 수단을; 구비한다.The apparatus of the present invention comprises a light source; An objective lens provided on a light propagation path from the light source facing the disk surface and having a predetermined effective diameter; A light splitting element provided between the objective lens and the light source; A photo detector for detecting the light reflected from the disk by being split from the light splitting element and incident; Light control means provided on a light propagation path toward the photo detector to block or scatter or reflect light in a region between paraxial and circular axes; Equipped.

이러한 본 발명 장치는 구조가 간단하고 제작단가가 저렴할 뿐 아니라 광에 대한 구면수차의 영향을 줄임으로써 두께가 다른 디스크를 하나의 디스크 드라이브에서 사용할 수 있게 된다.The apparatus of the present invention is simple in structure, low in manufacturing cost, and can reduce the influence of spherical aberration on light so that disks of different thicknesses can be used in one disk drive.

Description

광픽업장치Optical pickup device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제2도는 제1도에 도시된 종래 렌즈 장치에 의해 두께가 상대적으로 두꺼운 디스크에 광이 집속되는 상태를 보인다.FIG. 2 shows a state in which light is focused on a disk having a relatively thick thickness by the conventional lens device shown in FIG.

제5도는 제4도에 도시된 본 발명 광 픽업 장치에 있어서, 광검출기와 광제어막과의 관계를 보인 발췌 사시도이다.FIG. 5 is an excerpt perspective view showing the relationship between the photodetector and the light control film in the optical pickup device of the present invention shown in FIG.

Claims (9)

광원과; 디스크 면을 향하는 상기 광원으로부터의 광 진행 경로 상에 마련되는 것으로 소정의 유효직경을 가지는 대물 렌즈와; 상기 대물 렌즈와 상기 광원의 사이에 마련되는 광분할소자와; 상기 광분할소자로부터 분할되어 입사되는 것으로 상기 디스크로부터 반사된 광을 검지하는 광 검출기와; 상기 광 검출기를 향하는 광 진행 경상에 마련되어 입사광의 근축과 원축 사이 영역의 광을 차단 또는 산란 또는 반사하는 광 제어 수단을; 구비하는 것을 특징으로 하는 광픽업 장치.A light source; An objective lens provided on a light propagation path from the light source facing the disk surface and having a predetermined effective diameter; A light splitting element provided between the objective lens and the light source; A photo detector for detecting the light reflected from the disk by being split from the light splitting element and incident; Light control means provided on a light propagation path toward the light detector to block or scatter or reflect light in a region between the paraxial and circular axes of the incident light; Optical pickup device characterized in that it comprises. 제1항에 있어서, 상기 광 제어 수단은 별도의 투명부재에 단독적으로 마련되어 있는 것을 특징으로 하는 광픽업 장치.The optical pickup apparatus of claim 1, wherein the light control means is provided in a separate transparent member. 제1항 또는 제2항에 있어서, 상기 광제어수단은 광을 차단, 흡수, 산란, 반사등을 할 수 있는 코팅막에 의해 제공되는 것을 특징으로 하는 광픽업 장치.The optical pickup apparatus of claim 1 or 2, wherein the light control means is provided by a coating film capable of blocking, absorbing, scattering, and reflecting light. 제3항에 있어서, 상기 광검출기는 다수 분할될 제1광검지영역과, 그리고 제1광검지영역을 에워싸는 다수 분할된 제2광검지영역으로 구분되어 있는 것을 특징으로 하는 광픽업 장치.The optical pickup apparatus of claim 3, wherein the photodetector is divided into a first photodetection area to be divided into a plurality of parts, and a plurality of divided second photodetection areas surrounding the first photodetection area. 제4항에 있어서, 상기 제1광검지영역은, 두꺼운 디스크로부터 반사된 근축영역의 광에 대응함과 동시에 얇은 디스크로부터 반사된 광의 근축영역과 원축영역의 광에 대응하는 크기를 가지는 것을 특징으로 하는 광픽업 장치.The light detecting region of claim 4, wherein the first optical detection region has a size corresponding to the light of the paraxial region reflected from the thick disk and the light of the paraxial region and the circular region of the light reflected from the thin disk. Optical pickup device. 제5항에 있어서, 상기 광검출기의 제1광검지영역과 제2광검지영역은 상하좌우 대칭적으로 4분할되어 있고, 전체적으로 마름모꼴을 이루는 것을 특징으로 하는 광픽업 장치.6. The optical pickup apparatus of claim 5, wherein the first and second photodetection regions of the photodetector are divided into four symmetrically in up, down, left, and right directions and form a rhombus as a whole. 제1항 또는 제2항에 있어서, 상기 광검출기는 두꺼운 디스크로부터 반사된 근축영역의 광에 대응함과 동시에 얇은 디스크로부터 반사된 광의 근축영역과 원축영역의 광에 대응하는 크기의 광검지영역을 가지며, 상기 광검출기는 다수 분할될 제1광검지영역과, 그리고 제1광검지영역을 에워싸는 다수 분할된 제2광검지영역으로 구분되어 있는 것을 특징으로 하는 광픽업 장치.3. The photodetector according to claim 1 or 2, wherein the photodetector has a photodetection region of a size corresponding to the paraxial region of the light reflected from the thin disk and the light of the axial region, while corresponding to the light of the paraxial region reflected from the thick disk. And the photodetector is divided into a first photodetection area to be divided into a plurality of parts and a second divided photodetection area surrounding the first photodetection area. 제7항에 있어서, 상기 제1광검지영역은, 얇은 디스크로부터 반사된 근축영역의 광에 대응함과 동시에 두꺼운 디스크로부터 반사된 광의 근축영역과 원축영역의 광에 대응하는 크기를 가지는 것을 특징으로 하는 광픽업 장치.8. The light detecting region of claim 7, wherein the first light detecting region has a size corresponding to light in the paraxial region reflected from the thin disk and corresponding to light in the paraxial region and the circular region of the light reflected from the thick disk. Optical pickup device. 제8항에 있어서, 상기 광검출기의 제1광검지영역과 제2광검지영역은 상하좌우 대칭적으로 4분할되어 있고, 전체적으로 마름모꼴을 이루는 것을 특징으로 하는 광픽업 장치.The optical pickup apparatus of claim 8, wherein the first photodetection region and the second photodetection region of the photodetector are divided into four symmetrically in up, down, left, and right directions and form a rhombus as a whole. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950033913A 1995-08-30 1995-10-04 Optical pickup device KR100200858B1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
KR1019950033913A KR100200858B1 (en) 1995-10-04 1995-10-04 Optical pickup device
US08/708,200 US5907530A (en) 1995-08-30 1996-09-06 Optical pickup device
NL1004079A NL1004079C2 (en) 1995-10-04 1996-09-20 Optical scanner.
IT96MI001992A IT1285223B1 (en) 1995-10-04 1996-09-27 OPTICAL READER
FR9611994A FR2739717B1 (en) 1995-10-04 1996-10-02 OPTICAL READING DEVICE
DE19640837A DE19640837B4 (en) 1995-10-04 1996-10-02 Optical recording and reproducing apparatus
GB9620677A GB2306045B (en) 1995-10-04 1996-10-04 Optical pickup device
JP26433996A JP3872145B2 (en) 1995-10-04 1996-10-04 Optical pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950033913A KR100200858B1 (en) 1995-10-04 1995-10-04 Optical pickup device

Publications (2)

Publication Number Publication Date
KR970023055A true KR970023055A (en) 1997-05-30
KR100200858B1 KR100200858B1 (en) 1999-06-15

Family

ID=19429197

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950033913A KR100200858B1 (en) 1995-08-30 1995-10-04 Optical pickup device

Country Status (7)

Country Link
JP (1) JP3872145B2 (en)
KR (1) KR100200858B1 (en)
DE (1) DE19640837B4 (en)
FR (1) FR2739717B1 (en)
GB (1) GB2306045B (en)
IT (1) IT1285223B1 (en)
NL (1) NL1004079C2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09219036A (en) * 1996-02-15 1997-08-19 Nec Corp Optical head device
WO2000039791A1 (en) * 1998-12-29 2000-07-06 Koninklijke Philips Electronics N.V. Optical scanning device for two types of record carriers

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60185230A (en) * 1984-03-02 1985-09-20 Pioneer Electronic Corp Focal error detector
US5281797A (en) * 1991-12-26 1994-01-25 Hitachi, Ltd. Short wavelength optical disk head having a changeable aperture
US5349592A (en) * 1992-02-27 1994-09-20 Kabushiki Kaisha Toshiba Super-resolution optical element for use in image forming apparatus
JP2532818B2 (en) * 1993-02-01 1996-09-11 松下電器産業株式会社 Objective lens and optical head device
JPH06295467A (en) * 1993-04-01 1994-10-21 Nippon Columbia Co Ltd Optical pickup device
JP3548259B2 (en) * 1994-04-07 2004-07-28 ペンタックス株式会社 Magneto-optical head device
JPH10500526A (en) * 1995-03-15 1998-01-13 フィリップス エレクトロニクス ネムローゼ フェンノートシャップ Apparatus for optically scanning a recording medium
WO1997008691A1 (en) * 1995-08-30 1997-03-06 Samsung Electronics Co., Ltd. Lens device and an optical pickup apparatus using the lens device

Also Published As

Publication number Publication date
GB9620677D0 (en) 1996-11-20
FR2739717B1 (en) 1999-01-08
KR100200858B1 (en) 1999-06-15
NL1004079A1 (en) 1997-04-08
ITMI961992A1 (en) 1998-03-27
IT1285223B1 (en) 1998-06-03
DE19640837A1 (en) 1997-04-10
JPH09120572A (en) 1997-05-06
GB2306045A (en) 1997-04-23
NL1004079C2 (en) 1998-01-07
FR2739717A1 (en) 1997-04-11
JP3872145B2 (en) 2007-01-24
DE19640837B4 (en) 2011-01-27
GB2306045B (en) 1999-08-04

Similar Documents

Publication Publication Date Title
KR970012402A (en) An objective lens apparatus and a method of obtaining a stable focus servo signal, an optical pickup apparatus using the same, a method of discriminating a disc having a different thickness, and a method of reproducing and recording information from discs having different thicknesses
TW237542B (en) Multiple data surface optical medium and storage system with fixed aberration correction
KR870011588A (en) Improved optical head
JP3284447B2 (en) Focus sensing device using attenuated total reflection spectroscopy
KR970063071A (en) An objective lens apparatus and a method of obtaining a stable focus servo signal, an optical pickup apparatus using the same, a method of discriminating a disc having a different thickness, and a method of reproducing and recording information from discs having different thicknesses
KR0176595B1 (en) Objective lens device and optic pick-up device using objective lens device
KR970023016A (en) Optical pickup device
KR100200868B1 (en) Optical pickup device
KR970023055A (en) Optical pickup device
KR950004127A (en) Optical pickup device for magneto-optical disk
KR970012379A (en) Dual Focus Optical Pickup
KR960025411A (en) Optical pickup for double sided disc
KR970063064A (en) Dual Focus Optical Pick-Up Unit
KR970017245A (en) Dual Focus Optical Pickup
KR960038794A (en) Optical information reproduction device
JP2547983B2 (en) Optical information recording / reproducing mechanism
KR930003035A (en) Optical recorder
KR970050391A (en) Integrated dual focus optical pick-up device
JPH05313100A (en) Light beam condensing method and optical information reader
JPH079208Y2 (en) Optical pickup objective lens position detector
KR970050328A (en) Dual Focus Optical Pick-Up Unit
KR970050329A (en) Dual Focus Optical Pick-Up Unit
KR970063063A (en) Dual Focus Optical Pick-Up Unit
KR970023015A (en) Optical pickup for high-density recording and playback compatible with discs of different thickness
KR970050396A (en) Optical pickup device

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20090226

Year of fee payment: 11

LAPS Lapse due to unpaid annual fee