WO2008126494A1 - Optical pickup device and optical element - Google Patents

Optical pickup device and optical element Download PDF

Info

Publication number
WO2008126494A1
WO2008126494A1 PCT/JP2008/053505 JP2008053505W WO2008126494A1 WO 2008126494 A1 WO2008126494 A1 WO 2008126494A1 JP 2008053505 W JP2008053505 W JP 2008053505W WO 2008126494 A1 WO2008126494 A1 WO 2008126494A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical
pickup device
optical pickup
object lens
light flux
Prior art date
Application number
PCT/JP2008/053505
Other languages
French (fr)
Japanese (ja)
Inventor
Kiyono Ikenaka
Kohei Ota
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 JP2009508962A priority Critical patent/JPWO2008126494A1/en
Publication of WO2008126494A1 publication Critical patent/WO2008126494A1/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
    • G11B7/125—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
    • 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
    • G11B7/1376—Collimator 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)
  • Lenses (AREA)
  • Optical Head (AREA)

Abstract

An optical pickup device which enables low-profile configuration, improved optical utilization efficiency and information recording on different kinds of optical disks, and an optical element used therein. A diffraction structure is provided on the optical surface of a first object lens section (OBJ1). The optical pickup device can record and/or regenerate the information on the HD and DVD in a compatible manner while keeping the power difference and improving the optical utilization efficiency by making a first light flux and a second light flux incident into the first object lens section (OBJ1) with both of light fluxes placed into an infinite parallel state for example. On the other hand, the optical surface of a second object lens section (OBJ2) comprises only the refractive surface. The optical pickup device can record and/or regenerate the information on the CD by making a third light flux incident in an infinite parallel state for example. Employment of such a configuration ensures shorter focal distance of an optical element (OE) and longer working distance. As a result, the optical pickup device is well suited for mounting on a notebook PC or the like.
PCT/JP2008/053505 2007-03-30 2008-02-28 Optical pickup device and optical element WO2008126494A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009508962A JPWO2008126494A1 (en) 2007-03-30 2008-02-28 Optical pickup device and optical element

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-092208 2007-03-30
JP2007092208 2007-03-30

Publications (1)

Publication Number Publication Date
WO2008126494A1 true WO2008126494A1 (en) 2008-10-23

Family

ID=39863650

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/053505 WO2008126494A1 (en) 2007-03-30 2008-02-28 Optical pickup device and optical element

Country Status (2)

Country Link
JP (1) JPWO2008126494A1 (en)
WO (1) WO2008126494A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005293686A (en) * 2004-03-31 2005-10-20 Konica Minolta Opto Inc Optical pickup device
JP2005346883A (en) * 2004-06-07 2005-12-15 Konica Minolta Opto Inc Method for assembling optical pickup device and optical pickup device
JP2006147053A (en) * 2004-11-19 2006-06-08 Konica Minolta Opto Inc Optical pickup device
JP2006268899A (en) * 2005-03-22 2006-10-05 Konica Minolta Opto Inc 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 (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005293686A (en) * 2004-03-31 2005-10-20 Konica Minolta Opto Inc Optical pickup device
JP2005346883A (en) * 2004-06-07 2005-12-15 Konica Minolta Opto Inc Method for assembling optical pickup device and optical pickup device
JP2006147053A (en) * 2004-11-19 2006-06-08 Konica Minolta Opto Inc Optical pickup device
JP2006268899A (en) * 2005-03-22 2006-10-05 Konica Minolta Opto Inc 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
JPWO2008126494A1 (en) 2010-07-22

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