KR970050328A - Dual Focus Optical Pick-Up Unit - Google Patents

Dual Focus Optical Pick-Up Unit Download PDF

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Publication number
KR970050328A
KR970050328A KR1019950054339A KR19950054339A KR970050328A KR 970050328 A KR970050328 A KR 970050328A KR 1019950054339 A KR1019950054339 A KR 1019950054339A KR 19950054339 A KR19950054339 A KR 19950054339A KR 970050328 A KR970050328 A KR 970050328A
Authority
KR
South Korea
Prior art keywords
dual
optical pick
hologram element
focus optical
objective lens
Prior art date
Application number
KR1019950054339A
Other languages
Korean (ko)
Other versions
KR0181815B1 (en
Inventor
김기태
Original Assignee
배순훈
대우전자 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 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019950054339A priority Critical patent/KR0181815B1/en
Publication of KR970050328A publication Critical patent/KR970050328A/en
Application granted granted Critical
Publication of KR0181815B1 publication Critical patent/KR0181815B1/en

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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
    • G11B7/12—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
    • G11B7/1359—Single prisms
    • 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
    • G11B7/1395—Beam splitters or combiners

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

본 발명은 디지탈 디스크 플레이어의 듀얼 포커스 광 픽-업장치에 관한 것으로, 특히 두께가 1.2mm인 디스크과, 두께가 0.6mm 인 디스크에 기록된 정보를 읽어들일 수 있도록 하는 디지탈 디스크 플레이어의 듀얼 포커스 광 픽-업장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dual focus optical pick-up device of a digital disc player, and more particularly, to a dual focus optical pick of a digital disc player capable of reading information recorded on a disc having a thickness of 1.2 mm and a disc having a thickness of 0.6 mm. It is about an up device.

이를 위하여 레이저 다이오드, 홀로그램격자, 광검출기 등이 일체로 형성된 홀로그램소자로부터 발생되는 레이저 빔을 대물렌즈로 집광하여 두께가 서로다른 디스크의 정보를 읽어들이는 듀얼 포커스 광 픽-업장치에 있어서, 상기 홀로그램소자와 대물렌즈 사이에 소정간격을 두고 설치되고 입사빔을 2종류의 반사각으로 유지하여 뱀의 폭을 서로 다르게 조사시켜 각각의 디스크에 빔 포커스가 형성되도록 하는 듀얼 빔 반사렌즈를 구비하여서 된 것이다.In the dual focus optical pick-up apparatus for reading information of discs having different thicknesses by collecting a laser beam generated from a hologram element integrally formed with a laser diode, a hologram grating, a photodetector, etc. with an objective lens. It is provided with a predetermined distance between the hologram element and the objective lens, and is provided with a dual beam reflection lens to maintain the incident beam at two kinds of reflection angles to irradiate the snake width differently so that beam focus is formed on each disk. .

Description

듀얼 포커스 광 픽-업장치Dual Focus Optical Pick-Up Unit

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

제3도는 본 발명에 따른 광 픽-업장치의 구성도.3 is a block diagram of an optical pick-up apparatus according to the present invention.

Claims (2)

레이저 다이오드, 홀로그램격자, 광검출기 등이 일체로 형성된 홀로그램소자(61)로 부터 발생되는 레이져 빔을 대물렌즈(67)로 집광하여 두께가 서로다른 디스크의 정보를 읽어들이는 듀얼 포커스 광 픽-업장치에 있어서, 상기 홀로그램소자(61)와 대물렌즈(67) 사이에 소정간격을 두고 설치되고 입사빔을 2종류의 반사각으로 유지하여 빔의 폭을 서로 다르게 조사시켜 각각의 디스크에 빔 포커스가 형성되도록 하는 듀얼 빔 반사렌즈(62)를 구비하여설 된 듀얼 포커스 광 픽-업장치.Dual-focus optical pick-up, which reads information on disks of different thicknesses by converging the laser beam generated from the hologram element 61 in which laser diode, hologram lattice, photodetector, etc. are integrally formed with the objective lens 67 In the apparatus, the hologram element 61 and the objective lens 67 are provided with a predetermined interval, and the incident beams are kept at two kinds of reflection angles to irradiate different beam widths so that beam focus is formed on each disk. Dual focus optical pick-up device provided with a dual beam reflecting lens (62). 제1항에 있어서, 상기 듀얼 빔 반사렌즈(62)는, 삼각꼴 형상의 프리즘(63)과, 상기 프리즘(63) 일면에 형성되어 상기 홀로그램소자(61) 및 대물렌즈(67)로 부터 조사되는 레이저빔을 일정한 비의 반사광과 투과광으로 분리하는 빔 스폴리트면(64)과, 상기 프리즘(63)의 나머지면에 형성되어 상기 홀로그램소자(61)에서 입사되는 레이저빔을 반사시켜 듀얼 빔을 형성하고, 상기 대물렌즈(67)에서 조사되는 디스크의 광정보를 반사시켜 호로그램소자(61)에 내장된 광검출기로 조사하는 제1 및 제2반사면(65)(66)을 구비하여서 된 듀얼 포커스 광 픽-업장치.The dual beam reflecting lens 62 is formed on a triangular prism 63 and one surface of the prism 63 and irradiated from the hologram element 61 and the objective lens 67. The beam split surface 64 which separates the laser beam into a predetermined ratio of reflected light and transmitted light, and a laser beam incident on the other surface of the prism 63 and reflected from the hologram element 61 to reflect the dual beam. And first and second reflecting surfaces 65 and 66 for reflecting optical information of the disk irradiated from the objective lens 67 and irradiating with a photodetector built into the hologram element 61. Dual focus optical pick-up device. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950054339A 1995-12-22 1995-12-22 Dual focus optical pickup device KR0181815B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950054339A KR0181815B1 (en) 1995-12-22 1995-12-22 Dual focus optical pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950054339A KR0181815B1 (en) 1995-12-22 1995-12-22 Dual focus optical pickup device

Publications (2)

Publication Number Publication Date
KR970050328A true KR970050328A (en) 1997-07-29
KR0181815B1 KR0181815B1 (en) 1999-10-01

Family

ID=19442995

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950054339A KR0181815B1 (en) 1995-12-22 1995-12-22 Dual focus optical pickup device

Country Status (1)

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KR (1) KR0181815B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100446726B1 (en) * 2001-11-27 2004-09-01 엘지전자 주식회사 Apparatus for near field optical recorder

Also Published As

Publication number Publication date
KR0181815B1 (en) 1999-10-01

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