JP4391026B2 - ２波長用開口制限フィルタおよびこれを用いた光ピックアップ装置 - Google Patents

２波長用開口制限フィルタおよびこれを用いた光ピックアップ装置 Download PDF

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Publication number
JP4391026B2
JP4391026B2 JP2001019943A JP2001019943A JP4391026B2 JP 4391026 B2 JP4391026 B2 JP 4391026B2 JP 2001019943 A JP2001019943 A JP 2001019943A JP 2001019943 A JP2001019943 A JP 2001019943A JP 4391026 B2 JP4391026 B2 JP 4391026B2
Authority
JP
Japan
Prior art keywords
wavelength
light
annular zone
limiting filter
aperture limiting
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
JP2001019943A
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English (en)
Japanese (ja)
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JP2002230824A5 (enExample
JP2002230824A (ja
Inventor
有 北原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujinon Corp
Original Assignee
Fujinon Corp
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 Fujinon Corp filed Critical Fujinon Corp
Priority to JP2001019943A priority Critical patent/JP4391026B2/ja
Priority to US09/986,013 priority patent/US6545823B2/en
Publication of JP2002230824A publication Critical patent/JP2002230824A/ja
Publication of JP2002230824A5 publication Critical patent/JP2002230824A5/ja
Application granted granted Critical
Publication of JP4391026B2 publication Critical patent/JP4391026B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
    • G11B7/1367—Stepped phase plates
    • 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
    • G11B7/139—Numerical aperture control means
    • 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)
  • Optical Filters (AREA)
  • Optical Elements Other Than Lenses (AREA)
JP2001019943A 2001-01-29 2001-01-29 ２波長用開口制限フィルタおよびこれを用いた光ピックアップ装置 Expired - Fee Related JP4391026B2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2001019943A JP4391026B2 (ja) 2001-01-29 2001-01-29 ２波長用開口制限フィルタおよびこれを用いた光ピックアップ装置
US09/986,013 US6545823B2 (en) 2001-01-29 2001-11-07 Double-wavelength aperture restricting filter and optical pickup apparatus using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001019943A JP4391026B2 (ja) 2001-01-29 2001-01-29 ２波長用開口制限フィルタおよびこれを用いた光ピックアップ装置

Publications (3)

Publication Number Publication Date
JP2002230824A JP2002230824A (ja) 2002-08-16
JP2002230824A5 JP2002230824A5 (enExample) 2007-12-06
JP4391026B2 true JP4391026B2 (ja) 2009-12-24

Family

ID=18885726

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001019943A Expired - Fee Related JP4391026B2 (ja) 2001-01-29 2001-01-29 ２波長用開口制限フィルタおよびこれを用いた光ピックアップ装置

Country Status (2)

Country Link
US (1) US6545823B2 (enExample)
JP (1) JP4391026B2 (enExample)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003067972A (ja) * 2001-05-29 2003-03-07 Nec Corp 光ヘッド装置および光学式情報記録再生装置
US7577077B2 (en) * 2002-09-05 2009-08-18 Konica Corporation Optical pickup apparatus and optical element
US20070220537A1 (en) * 2003-06-16 2007-09-20 Microsoft Corporation Counterfeit-resistant portable storage media with embedded security device
US7086073B2 (en) * 2003-06-16 2006-08-01 Microsoft Corporation Optical storage media with embedded security device
CN115755338B (zh) * 2022-11-03 2025-10-24 长春精仪光电技术有限公司 一种宽波段准直镜头

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3531024B2 (ja) 1996-07-10 2004-05-24 コニカミノルタホールディングス株式会社 光情報記録媒体の記録及び／又は再生用光学系及び対物レンズ
TW432225B (en) * 1998-06-03 2001-05-01 Konishiroku Photo Ind Optical pickup apparatus

Also Published As

Publication number Publication date
US20020145812A1 (en) 2002-10-10
US6545823B2 (en) 2003-04-08
JP2002230824A (ja) 2002-08-16

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