WO2008142959A1 - Objective optical element for optical pickup device, optical pickup device and method for designing objective optical element - Google Patents

Objective optical element for optical pickup device, optical pickup device and method for designing objective optical element Download PDF

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Publication number
WO2008142959A1
WO2008142959A1 PCT/JP2008/058181 JP2008058181W WO2008142959A1 WO 2008142959 A1 WO2008142959 A1 WO 2008142959A1 JP 2008058181 W JP2008058181 W JP 2008058181W WO 2008142959 A1 WO2008142959 A1 WO 2008142959A1
Authority
WO
WIPO (PCT)
Prior art keywords
pickup device
optical element
optical pickup
objective optical
objective
Prior art date
Application number
PCT/JP2008/058181
Other languages
French (fr)
Japanese (ja)
Inventor
Kentarou Nakamura
Tohru Kimura
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 JP2009515122A priority Critical patent/JPWO2008142959A1/en
Publication of WO2008142959A1 publication Critical patent/WO2008142959A1/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

Abstract

An objective optical element for an optical pickup device which can record and/or reproduce information appropriately using a material of high refractive index. An optical pickup device and a method for designing the objective optical element are also provided. Assuming that the relation of expression (2) is satisfied when the number of apertures NA satisfies the expression (1), and the relation of expression (4) is satisfied when the number of apertures NA satisfies the expression (3) in an objective optical element, the focal length, the thickness on the axis and the working distance required for mounting an actual optical pickup device can be secured while improving the temperature characteristics. 0.80<NA<0.90 (1) 40,000<β/γ<50,000 (2) 0.60<NA<0.70 (3) 800<β/γ<1,600 (4)
PCT/JP2008/058181 2007-05-18 2008-04-28 Objective optical element for optical pickup device, optical pickup device and method for designing objective optical element WO2008142959A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009515122A JPWO2008142959A1 (en) 2007-05-18 2008-04-28 Objective optical element for optical pickup device, optical pickup apparatus, and method of designing objective optical element

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-132579 2007-05-18
JP2007132579 2007-05-18

Publications (1)

Publication Number Publication Date
WO2008142959A1 true WO2008142959A1 (en) 2008-11-27

Family

ID=40031675

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/058181 WO2008142959A1 (en) 2007-05-18 2008-04-28 Objective optical element for optical pickup device, optical pickup device and method for designing objective optical element

Country Status (2)

Country Link
JP (1) JPWO2008142959A1 (en)
WO (1) WO2008142959A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012237616A (en) * 2011-05-11 2012-12-06 Mitsubishi Electric Corp Optical encoder and method for manufacturing the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001143301A (en) * 1999-11-17 2001-05-25 Konica Corp Optical pickup device and objective for optical pickup device
JP2005209321A (en) * 2003-06-18 2005-08-04 Konica Minolta Opto Inc Optical element, aberration correction element and condensing element for optical pickup device, objective optical system, optical pickup device, and optical information recording and reproducing device
JP2005317103A (en) * 2004-04-28 2005-11-10 Konica Minolta Opto Inc Optical element and optical pickup device
JP2006092720A (en) * 2004-08-25 2006-04-06 Konica Minolta Opto Inc Objective optical device, optical pickup device, and optical disk driving device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001143301A (en) * 1999-11-17 2001-05-25 Konica Corp Optical pickup device and objective for optical pickup device
JP2005209321A (en) * 2003-06-18 2005-08-04 Konica Minolta Opto Inc Optical element, aberration correction element and condensing element for optical pickup device, objective optical system, optical pickup device, and optical information recording and reproducing device
JP2005317103A (en) * 2004-04-28 2005-11-10 Konica Minolta Opto Inc Optical element and optical pickup device
JP2006092720A (en) * 2004-08-25 2006-04-06 Konica Minolta Opto Inc Objective optical device, optical pickup device, and optical disk driving device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012237616A (en) * 2011-05-11 2012-12-06 Mitsubishi Electric Corp Optical encoder and method for manufacturing the same

Also Published As

Publication number Publication date
JPWO2008142959A1 (en) 2010-08-05

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