WO2008099571A1 - Composite optical element, optical pickup device and method for forming composite optical element - Google Patents

Composite optical element, optical pickup device and method for forming composite optical element Download PDF

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Publication number
WO2008099571A1
WO2008099571A1 PCT/JP2007/074819 JP2007074819W WO2008099571A1 WO 2008099571 A1 WO2008099571 A1 WO 2008099571A1 JP 2007074819 W JP2007074819 W JP 2007074819W WO 2008099571 A1 WO2008099571 A1 WO 2008099571A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical element
composite optical
objective lenses
objective
pickup device
Prior art date
Application number
PCT/JP2007/074819
Other languages
French (fr)
Japanese (ja)
Inventor
Takayuki Noda
Shogo Yamamoto
Tomonobu Tokunaga
Yasuhiro Saiki
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 JP2008557995A priority Critical patent/JPWO2008099571A1/en
Publication of WO2008099571A1 publication Critical patent/WO2008099571A1/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
    • G11B7/1372—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)
  • Lenses (AREA)

Abstract

Provided is a highly accurate composite optical element wherein arrangement of a plurality of objective lenses, i.e., constitution elements, is suitably set to meet required accuracies of the objective lenses. In a composite optical element (10) for optical pickup devices, first and second objective lenses (12, 13) and an outer frame section (11) for supporting the first and the second objective lenses (12, 13) are integrally formed. Of the first and the second objective lenses (12, 13), the first objective lens (12), which forms the smallest spot diameter (or has the highest numerical aperture), is arranged at a position closer to the center of gravity (CG) of the entire composite optical element (10) than the other second objective lense (13).
PCT/JP2007/074819 2007-02-16 2007-12-25 Composite optical element, optical pickup device and method for forming composite optical element WO2008099571A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008557995A JPWO2008099571A1 (en) 2007-02-16 2007-12-25 Composite optical element, optical pickup device, and molding method of composite optical element

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007036872 2007-02-16
JP2007-036872 2007-02-16

Publications (1)

Publication Number Publication Date
WO2008099571A1 true WO2008099571A1 (en) 2008-08-21

Family

ID=39689821

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/074819 WO2008099571A1 (en) 2007-02-16 2007-12-25 Composite optical element, optical pickup device and method for forming composite optical element

Country Status (2)

Country Link
JP (1) JPWO2008099571A1 (en)
WO (1) WO2008099571A1 (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
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
JP2007066360A (en) * 2005-08-29 2007-03-15 Konica Minolta Opto Inc Objective lens unit and optical pickup device
JP2007328902A (en) * 2006-05-09 2007-12-20 Sony Corp Objective lens apparatus, optical pickup device, optical disk driving apparatus, and method of driving objective lens

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
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
JP2007066360A (en) * 2005-08-29 2007-03-15 Konica Minolta Opto Inc Objective lens unit and optical pickup device
JP2007328902A (en) * 2006-05-09 2007-12-20 Sony Corp Objective lens apparatus, optical pickup device, optical disk driving apparatus, and method of driving objective lens

Also Published As

Publication number Publication date
JPWO2008099571A1 (en) 2010-05-27

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