WO2008117587A1 - 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
WO2008117587A1
WO2008117587A1 PCT/JP2008/052640 JP2008052640W WO2008117587A1 WO 2008117587 A1 WO2008117587 A1 WO 2008117587A1 JP 2008052640 W JP2008052640 W JP 2008052640W WO 2008117587 A1 WO2008117587 A1 WO 2008117587A1
Authority
WO
WIPO (PCT)
Prior art keywords
effective diameter
optical
region
pickup device
respect
Prior art date
Application number
PCT/JP2008/052640
Other languages
French (fr)
Japanese (ja)
Inventor
Kiyono Ikenaka
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 JP2009506241A priority Critical patent/JPWO2008117587A1/en
Publication of WO2008117587A1 publication Critical patent/WO2008117587A1/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
    • G11B7/135—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

It is an object to provide an optical element for an optical pickup device in which two objective lenses are integrally formed to compatibly carry out recording and/or reproducing information for different discs. For that purpose, a first effective diameter outside region (EO1) is shaped to stretch toward the outside of the optical axis with respect to a configuration (shown in a dotted line) defined by extending a first effective diameter inside region (EI1) so as to make an intersecting angle obtuse with respect to a flange unit (FL), and a second effective diameter outside region (EO2) is shaped to pull into the inside of the optical axis with respect to a configuration (shown in a dotted line) defined by extending a second effective diameter inside region (EI2) so as to separate from a first objective lens (OL1). As a result, the formability of an optical element (OE) can be enhanced. Further, if at least one of the first effective diameter outside region (EO1) and the second effective diameter outside region (EO2) is provided with an optical path difference assigning structure, an under or over spherical aberration can be given to a passing light flux.
PCT/JP2008/052640 2007-03-28 2008-02-18 Optical element for optical pickup device and optical pickup device WO2008117587A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009506241A JPWO2008117587A1 (en) 2007-03-28 2008-02-18 Optical element for optical pickup device and optical pickup device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-083297 2007-03-28
JP2007083297 2007-03-28

Publications (1)

Publication Number Publication Date
WO2008117587A1 true WO2008117587A1 (en) 2008-10-02

Family

ID=39788326

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/052640 WO2008117587A1 (en) 2007-03-28 2008-02-18 Optical element for optical pickup device and optical pickup device

Country Status (2)

Country Link
JP (1) JPWO2008117587A1 (en)
WO (1) WO2008117587A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4993326B2 (en) * 2009-03-30 2012-08-08 コニカミノルタアドバンストレイヤー株式会社 lens

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0981947A (en) * 1995-09-08 1997-03-28 Tdk Corp Objective lens driving device of optical disk device and objective lens
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
JP2002150595A (en) * 2000-11-14 2002-05-24 Konica Corp Object lens for optical pickup device, and optical pickup device
JP2003151164A (en) * 2001-11-15 2003-05-23 Konica Corp Objective lens for optical pickup device and optical pickup device
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 (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0981947A (en) * 1995-09-08 1997-03-28 Tdk Corp Objective lens driving device of optical disk device and objective lens
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
JP2002150595A (en) * 2000-11-14 2002-05-24 Konica Corp Object lens for optical pickup device, and optical pickup device
JP2003151164A (en) * 2001-11-15 2003-05-23 Konica Corp Objective lens for optical pickup device and optical pickup device
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4993326B2 (en) * 2009-03-30 2012-08-08 コニカミノルタアドバンストレイヤー株式会社 lens

Also Published As

Publication number Publication date
JPWO2008117587A1 (en) 2010-07-15

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