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WO2009051019A1 - Dispositif de capture optique, élément optique d'objectif pour un dispositif de capture optique et dispositif d'enregistrement/reproduction d'information optique - Google Patents

Dispositif de capture optique, élément optique d'objectif pour un dispositif de capture optique et dispositif d'enregistrement/reproduction d'information optique Download PDF

Info

Publication number
WO2009051019A1
WO2009051019A1 PCT/JP2008/067918 JP2008067918W WO2009051019A1 WO 2009051019 A1 WO2009051019 A1 WO 2009051019A1 JP 2008067918 W JP2008067918 W JP 2008067918W WO 2009051019 A1 WO2009051019 A1 WO 2009051019A1
Authority
WO
WIPO (PCT)
Prior art keywords
light beam
optical element
objective optical
obj
pickup device
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2008/067918
Other languages
English (en)
Japanese (ja)
Inventor
Kentarou Nakamura
Tohru Kimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konica Minolta Opto Inc
Original Assignee
Konica Minolta Opto Inc
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 Konica Minolta Opto Inc filed Critical Konica Minolta Opto Inc
Priority to CN2008801118126A priority Critical patent/CN101828225B/zh
Priority to JP2009538046A priority patent/JPWO2009051019A1/ja
Publication of WO2009051019A1 publication Critical patent/WO2009051019A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • G11B7/1372—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
    • G11B7/125—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
    • G11B7/1353—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
    • 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

Landscapes

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

Abstract

L'invention porte sur un dispositif de capture optique qui peut enregistrer et/ou reproduire des informations de manière appropriée sur/à partir de trois types de disques ayant différentes densités d'enregistrement tout en obtenant une simplification de la configuration et une réduction du coût. L'invention porte également sur un élément optique d'objectif et sur un dispositif d'enregistrement/reproduction d'information optique. Pendant l'utilisation d'un disque Blu-ray (BD), un premier faisceau lumineux entre dans un élément optique d'objectif (OBJ) dans l'état d'un faisceau de lumière parallèle infini, mais un second faisceau lumineux pendant l'utilisation d'un DVD et un troisième faisceau lumineux pendant l'utilisation d'un CD sont amenés à entrer dans l'élément optique d'objectif (OBJ) dans l'état d'un faisceau lumineux à divergence finie. Par conséquent, la quantité de correction d'aberration requise pendant l'utilisation compatible d'un DVD et d'un CD peut être limitée et le degré de contribution de l'erreur de production ou de l'erreur de transfert d'un moule pour le moulage de l'élément optique d'objectif (OBJ) peut être limité par l'augmentation du pas de zone (réduction de la puissance de diffraction) d'une structure conférant une différence de trajet optique. De plus, étant donné que la position où le troisième faisceau de lumière est collecté devient distante de l'élément optique d'objectif (OBJ), une longue distance de travail peut être assurée ou le pas de zone de la structure conférant une différence de trajet optique peut être rendu petit.
PCT/JP2008/067918 2007-10-18 2008-10-02 Dispositif de capture optique, élément optique d'objectif pour un dispositif de capture optique et dispositif d'enregistrement/reproduction d'information optique Ceased WO2009051019A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2008801118126A CN101828225B (zh) 2007-10-18 2008-10-02 光拾取装置、光拾取装置用物镜光学元件及光信息记录再生装置
JP2009538046A JPWO2009051019A1 (ja) 2007-10-18 2008-10-02 光ピックアップ装置、光ピックアップ装置用の対物光学素子及び光情報記録再生装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-271398 2007-10-18
JP2007271398 2007-10-18

Publications (1)

Publication Number Publication Date
WO2009051019A1 true WO2009051019A1 (fr) 2009-04-23

Family

ID=40567291

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/067918 Ceased WO2009051019A1 (fr) 2007-10-18 2008-10-02 Dispositif de capture optique, élément optique d'objectif pour un dispositif de capture optique et dispositif d'enregistrement/reproduction d'information optique

Country Status (3)

Country Link
JP (1) JPWO2009051019A1 (fr)
CN (1) CN101828225B (fr)
WO (1) WO2009051019A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012029581A1 (fr) * 2010-08-31 2012-03-08 コニカミノルタオプト株式会社 Objectif et dispositif de lecture optique

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005032410A (ja) * 2003-06-17 2005-02-03 Pentax Corp 光ピックアップ用対物レンズおよび光ピックアップ装置
WO2007102318A1 (fr) * 2006-03-07 2007-09-13 Konica Minolta Opto, Inc. Dispositif de lecture optique, element optique a objectif et dispositif d'enregistrement et de lecture de donnees optique

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101034570A (zh) * 2006-03-07 2007-09-12 柯尼卡美能达精密光学株式会社 光拾取装置、对物光学元件和光信息记录重放装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005032410A (ja) * 2003-06-17 2005-02-03 Pentax Corp 光ピックアップ用対物レンズおよび光ピックアップ装置
WO2007102318A1 (fr) * 2006-03-07 2007-09-13 Konica Minolta Opto, Inc. Dispositif de lecture optique, element optique a objectif et dispositif d'enregistrement et de lecture de donnees optique
WO2007102315A1 (fr) * 2006-03-07 2007-09-13 Konica Minolta Opto, Inc. Dispositif de lecture optique, element optique a objectif et dispositif d'enregistrement et de lecture de donnees optique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012029581A1 (fr) * 2010-08-31 2012-03-08 コニカミノルタオプト株式会社 Objectif et dispositif de lecture optique

Also Published As

Publication number Publication date
CN101828225B (zh) 2012-03-28
CN101828225A (zh) 2010-09-08
JPWO2009051019A1 (ja) 2011-03-03

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