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TWI222061B - Optical component and optical sensor using same - Google Patents

Optical component and optical sensor using same Download PDF

Info

Publication number
TWI222061B
TWI222061B TW091100080A TW91100080A TWI222061B TW I222061 B TWI222061 B TW I222061B TW 091100080 A TW091100080 A TW 091100080A TW 91100080 A TW91100080 A TW 91100080A TW I222061 B TWI222061 B TW I222061B
Authority
TW
Taiwan
Prior art keywords
laser beam
incident
diffractive
plane
optical
Prior art date
Application number
TW091100080A
Other languages
English (en)
Inventor
Shoichi Kyotani
Original Assignee
Alps Electric Co Ltd
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 Alps Electric Co Ltd filed Critical Alps Electric Co Ltd
Application granted granted Critical
Publication of TWI222061B publication Critical patent/TWI222061B/zh

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
    • G11B7/12—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
    • G11B7/125—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
    • 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
    • G11B2220/2545—CDs
    • 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
    • G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Semiconductor Lasers (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)

Description

經濟部智慧財產局員工消費合作社印製 上述各雷射的繞射光分別是在上述第1繞射光柵及上 述第2繞射光柵上被繞射的1次繞射光。 5 · —種光拾取器，使用申請專利範圍第1項或第2項 上述的光學構件，其特徵在於：包括： 具有分別射出上述各雷射光並使其光軸相互平行的2 個光源的2波長雷射二極體； 使從上述2波長雷射二極體射出的上述各雷射光入射 到上述入射面的上述第1繞射光柵上的上述光學構件； 使被上述第1繞射光柵繞射，又被上述光學構件的上 述第2繞射光柵繞射之後射出的光軸保持一致後的上述各 雷射光的繞射光聚束的物鏡； 聚束後的上述各雷射光的繞射光被DVD或CD光碟反射 ，使相對於該反射的各雷射光的各返回光透射上述物鏡、 上述光學構件後，入射到具有受光元件的受光構件上。 (請先閲讀背面之注意事項再填寫本頁) 紙 本 準 標 家 國
A4 V—/ S N 釐 9 2
TW091100080A 2001-02-26 2002-01-04 Optical component and optical sensor using same TWI222061B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001051223A JP2002250809A (ja) 2001-02-26 2001-02-26 光学部材およびそれを用いた光ピックアップ

Publications (1)

Publication Number Publication Date
TWI222061B true TWI222061B (en) 2004-10-11

Family

ID=18912051

Family Applications (1)

Application Number Title Priority Date Filing Date
TW091100080A TWI222061B (en) 2001-02-26 2002-01-04 Optical component and optical sensor using same

Country Status (4)

Country Link
JP (1) JP2002250809A (zh)
KR (1) KR100427828B1 (zh)
CN (1) CN1372259A (zh)
TW (1) TWI222061B (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI394152B (zh) * 2007-07-30 2013-04-21 Sony Corp Objective lens, optical read / write head and optical disc device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002311221A (ja) * 2001-04-18 2002-10-23 Alps Electric Co Ltd 光学部材及びこれを用いた光学装置
JP4148761B2 (ja) * 2002-11-26 2008-09-10 アークレイ株式会社 試験用具の検知機構、およびこの検知機構を備えた分析装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2597249B1 (fr) * 1986-04-11 1988-06-17 Thomson Csf Dispositif de lecture optique de support d'enregistrement optique
JPH0770065B2 (ja) * 1988-04-20 1995-07-31 シャープ株式会社 光ピックアップ装置
JPH0391125A (ja) * 1989-09-01 1991-04-16 Ricoh Co Ltd 波長多重記録方式を用いた光ピックアップ装置
KR100200848B1 (ko) * 1995-06-26 1999-06-15 윤종용 2중 초점 형성방법 및 이를 이용한 광픽업
JP2001176110A (ja) * 1999-12-13 2001-06-29 Alps Electric Co Ltd 光ピックアップ装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI394152B (zh) * 2007-07-30 2013-04-21 Sony Corp Objective lens, optical read / write head and optical disc device

Also Published As

Publication number Publication date
KR100427828B1 (ko) 2004-04-28
CN1372259A (zh) 2002-10-02
KR20020069476A (ko) 2002-09-04
JP2002250809A (ja) 2002-09-06

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Legal Events

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MM4A Annulment or lapse of patent due to non-payment of fees