WO2008111380A1 - Optical element for optical pickup device, and optical pickup device - Google Patents

Optical element for optical pickup device, and optical pickup device Download PDF

Info

Publication number
WO2008111380A1
WO2008111380A1 PCT/JP2008/053055 JP2008053055W WO2008111380A1 WO 2008111380 A1 WO2008111380 A1 WO 2008111380A1 JP 2008053055 W JP2008053055 W JP 2008053055W WO 2008111380 A1 WO2008111380 A1 WO 2008111380A1
Authority
WO
WIPO (PCT)
Prior art keywords
pickup device
cavity
axis line
optical
optical pickup
Prior art date
Application number
PCT/JP2008/053055
Other languages
French (fr)
Japanese (ja)
Inventor
Yuki Ono
Yuichi Atarashi
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 JP2009503949A priority Critical patent/JPWO2008111380A1/en
Publication of WO2008111380A1 publication Critical patent/WO2008111380A1/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
    • G11B7/12—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
    • 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
    • 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)

Abstract

An optical element unit for optical pickup device, which is simple and inexpensive although applicable for different kinds of optical discs, and an optical pickup device employing such optical element unit. At the time of molding, an upper die (UM) and a lower die (LM) are positioned such that the axis line (UX1) of a cavity (UM1) is aligned with the axis line (LX1) of a cavity (LM1). A lens surface shift of shift amount δ is thereby caused by the axis line (UX2) of a cavity (UM2) and the axis line (LX2) of a cavity (LM2) according to the production error of the upper die (UM) and the lower die (LM). When a plane or a curved surface having a large radius of curvature is employed as the surface (S2) of a second objective lens portion (OBJ2), impact of lens surface shaft is suppressed and an appropriate condensation spot can be formed for the information recording surface (RL2) of a CD by suppressing coma.
PCT/JP2008/053055 2007-03-15 2008-02-22 Optical element for optical pickup device, and optical pickup device WO2008111380A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009503949A JPWO2008111380A1 (en) 2007-03-15 2008-02-22 Optical element for optical pickup device and optical pickup device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-066596 2007-03-15
JP2007066596 2007-03-15

Publications (1)

Publication Number Publication Date
WO2008111380A1 true WO2008111380A1 (en) 2008-09-18

Family

ID=39759322

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/053055 WO2008111380A1 (en) 2007-03-15 2008-02-22 Optical element for optical pickup device, and optical pickup device

Country Status (2)

Country Link
JP (1) JPWO2008111380A1 (en)
WO (1) WO2008111380A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0963083A (en) * 1995-08-22 1997-03-07 Toshiba Corp Objective lens driving device
JPH09115170A (en) * 1995-10-18 1997-05-02 Seiko Epson Corp Composite objective lens and optical pickup device
JPH09230111A (en) * 1996-02-21 1997-09-05 Sharp Corp Integrally molded lens and pickup having the same, metal mold for molding lens as well as method for adjusting pickup
JP2005512253A (en) * 2001-12-05 2005-04-28 コーニンクレッカ　フィリップス　エレクトロニクス　エヌ　ヴィ Optical scanning device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0963083A (en) * 1995-08-22 1997-03-07 Toshiba Corp Objective lens driving device
JPH09115170A (en) * 1995-10-18 1997-05-02 Seiko Epson Corp Composite objective lens and optical pickup device
JPH09230111A (en) * 1996-02-21 1997-09-05 Sharp Corp Integrally molded lens and pickup having the same, metal mold for molding lens as well as method for adjusting pickup
JP2005512253A (en) * 2001-12-05 2005-04-28 コーニンクレッカ　フィリップス　エレクトロニクス　エヌ　ヴィ Optical scanning device

Also Published As

Publication number Publication date
JPWO2008111380A1 (en) 2010-06-24

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