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KR960005472A - Optical pickup using attenuated wave hologram element - Google Patents

Optical pickup using attenuated wave hologram element Download PDF

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Publication number
KR960005472A
KR960005472A KR1019940018074A KR19940018074A KR960005472A KR 960005472 A KR960005472 A KR 960005472A KR 1019940018074 A KR1019940018074 A KR 1019940018074A KR 19940018074 A KR19940018074 A KR 19940018074A KR 960005472 A KR960005472 A KR 960005472A
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KR
South Korea
Prior art keywords
hologram element
light
optical pickup
incident
light source
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Application number
KR1019940018074A
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Korean (ko)
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KR0129963B1 (en
Inventor
김진환
Original Assignee
김광호
삼성전자 주식회사
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Priority to KR1019940018074A priority Critical patent/KR0129963B1/en
Publication of KR960005472A publication Critical patent/KR960005472A/en
Application granted granted Critical
Publication of KR0129963B1 publication Critical patent/KR0129963B1/en
Anticipated expiration legal-status Critical
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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
    • G11B7/1353—Diffractive elements, e.g. holograms or gratings
    • 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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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)

Abstract

감쇄파 홀로그램소자를 채용한 광픽업이 개시되어 있다.An optical pickup employing attenuated wave hologram elements is disclosed.

감쇄파 홀로그램소자는 판형으로 이루어져 있고, 그 저면이 기판 상에 결합되며 그 상부에는 소정의 무늬가 형성되어 있다. 입사되는 기준파는 전반사되도록 상기 판형의 범선 방향에 대하여 소정 각도를 이루고 있다. 이 경우 상부에서 입사된 물체파는 감쇄파를 생성하여 상기 판형을 따라 출사되도록 한다. 또한, 광원에서 측면으로 입사된 광은 홀로그램소자에 상부방향으로 출사광을 생성한다. 상기 무늬에 의하여 이 출사광은 소정 각도 회절시킬 수 있다. 이러한 감쇄파 홀로그램소자의 특성을 이용하여 동일 기판 상에 이 감쇄파 홀로그램소자와, 광원 및 광검출기를 구비하여 단일 칩으로 제작이 가능하다. 또한, 상기 광검출기는 어레이 구조로 되어 있어, 측면에서 반사광을 수광한다. 따라서, 상기 광원의 열을 효율적으로 식힐 수 있고, 조립공수 및 단가절감과 제품의 박형화가 가능하다.The attenuation wave hologram element has a plate shape, and its bottom surface is coupled on a substrate, and a predetermined pattern is formed on the top thereof. The incident reference wave has a predetermined angle with respect to the plate-shaped sailing boat so as to totally reflect. In this case, the object wave incident from the top generates an attenuation wave to be emitted along the plate shape. In addition, light incident to the side from the light source generates light emitted upward in the hologram element. By this pattern, the emitted light can be diffracted by a predetermined angle. By using the characteristics of the attenuation wave hologram element, the attenuation wave hologram element, a light source and a photodetector are provided on the same substrate, and thus a single chip can be manufactured. In addition, the photodetector has an array structure, and receives the reflected light from the side surface. Therefore, the heat of the light source can be efficiently cooled, and the assembly labor and unit cost can be reduced, and the product can be thinned.

Description

감쇄파 홀로그램소자를 채용한 광픽업Optical pickup using attenuated wave hologram element

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

제3도는 본 발명에 따른 감쇄파 홀로그램소자를 채용한 광픽업을 나타낸 개략도.3 is a schematic diagram showing an optical pickup employing the attenuation wave hologram device according to the present invention.

제4도는 동일기판 상에 배치된 광원과 광검출기와 감쇄파 홀로그램소자를 나타낸 사시도.4 is a perspective view showing a light source, a photodetector, and an attenuation wave hologram element disposed on the same substrate.

Claims (3)

광을 발생하는 광원과, 그 광을 광디스크에 접속하는 대물렌즈와, 상기 광디스크의 반사광을 수광하여 전기신호를 출력하는 광검출기를 구비하여 정보를 기록 재생하는 광픽업에 있어서, 상기 광원에서 발생되는 광이 입사되는 입사면과, 이 입사면과 수직하고 그 입사하는 광을 상기 대물렌즈로 출사시키는 출사면을 가지며, 그 출사면에서 상기 반사광을 상기 광검출기에 수광되도록 회절시키는 감쇄파 홀로그램소자를 구비하여 되는 것을 특징으로 하는 감쇄파 홀로그램소자를 채용한 광픽업.An optical pickup for recording and reproducing information, comprising a light source for generating light, an objective lens for connecting the light to an optical disk, and an optical detector for receiving reflected light of the optical disk to output an electrical signal. An attenuation wave hologram element having an incident surface to which light is incident, and an exit surface perpendicular to the incident surface and emitting the incident light to the objective lens, and diffracting the reflected light to be received by the photodetector at the exit surface; An optical pickup employing an attenuation wave hologram element, characterized in that it is provided. 제1항에 있어서, 상기 광원과, 상기 감쇄파 홀로그램소자가 동일 평면 상에 배치된 것을 특징으로 하는 감쇄파 홀로그램소자를 채용한 광픽업.The optical pickup according to claim 1, wherein the light source and the attenuation wave hologram element are disposed on the same plane. 제1항에 있어서, 상기 광원과 광검출기 및 상기 감쇄파 홀로그램소자를 함께 수용하는 기판을 더 구비하고, 이들을 단일의 칩으로 형성하여 되는 것을 특징으로 하는 감쇄파 홀로그램소자를 채용한 광픽업.The optical pickup according to claim 1, further comprising a substrate for accommodating the light source, the photodetector, and the attenuation wave hologram element, and formed of a single chip. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940018074A 1994-07-26 1994-07-26 Optical pick-up apparatus using evanescent-wave hologram device Expired - Fee Related KR0129963B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940018074A KR0129963B1 (en) 1994-07-26 1994-07-26 Optical pick-up apparatus using evanescent-wave hologram device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940018074A KR0129963B1 (en) 1994-07-26 1994-07-26 Optical pick-up apparatus using evanescent-wave hologram device

Publications (2)

Publication Number Publication Date
KR960005472A true KR960005472A (en) 1996-02-23
KR0129963B1 KR0129963B1 (en) 1998-04-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940018074A Expired - Fee Related KR0129963B1 (en) 1994-07-26 1994-07-26 Optical pick-up apparatus using evanescent-wave hologram device

Country Status (1)

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KR (1) KR0129963B1 (en)

Also Published As

Publication number Publication date
KR0129963B1 (en) 1998-04-18

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