WO2006121966A3 - Light focusing systems with extended depth of focus - Google Patents

Light focusing systems with extended depth of focus Download PDF

Info

Publication number
WO2006121966A3
WO2006121966A3 PCT/US2006/017609 US2006017609W WO2006121966A3 WO 2006121966 A3 WO2006121966 A3 WO 2006121966A3 US 2006017609 W US2006017609 W US 2006017609W WO 2006121966 A3 WO2006121966 A3 WO 2006121966A3
Authority
WO
WIPO (PCT)
Prior art keywords
recording medium
focus
extended depth
spot
light focusing
Prior art date
Application number
PCT/US2006/017609
Other languages
French (fr)
Other versions
WO2006121966A2 (en
Inventor
Gregory E Johnson
Wade Thomas Cathey Jr
Edward Raymond Dowski Jr
Hans Brandon Wach
Original Assignee
Cdm Optics Inc
Gregory E Johnson
Wade Thomas Cathey Jr
Edward Raymond Dowski Jr
Hans Brandon Wach
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 Cdm Optics Inc, Gregory E Johnson, Wade Thomas Cathey Jr, Edward Raymond Dowski Jr, Hans Brandon Wach filed Critical Cdm Optics Inc
Publication of WO2006121966A2 publication Critical patent/WO2006121966A2/en
Publication of WO2006121966A3 publication Critical patent/WO2006121966A3/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
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0075—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for altering, e.g. increasing, the depth of field or depth of focus
    • 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
    • G11B7/1392—Means for controlling the beam wavefront, e.g. for correction of aberration
    • G11B7/13922—Means for controlling the beam wavefront, e.g. for correction of aberration passive
    • 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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
    • G11B7/261—Preparing a master, e.g. exposing photoresist, electroforming
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0045—Recording
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

A system and method record data on an optical recording medium with a recording threshold. An illumination source creates an electromagnetic radiation beam. Optics, with a pupil phase function, image the beam onto the optical recording medium. The pupil phase function modifies the phase of the beam to form an aerial image at a point on a surface of the optical recording medium. A spot of the recording medium is modified at the point when the intensity of the aerial image is above the recording threshold, the intensity of the aerial image at the spot and area of the spot being substantially constant over an extended depth of focus.
PCT/US2006/017609 2005-05-06 2006-05-08 Light focusing systems with extended depth of focus WO2006121966A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US67831505P 2005-05-06 2005-05-06
US60/678,315 2005-05-06

Publications (2)

Publication Number Publication Date
WO2006121966A2 WO2006121966A2 (en) 2006-11-16
WO2006121966A3 true WO2006121966A3 (en) 2006-12-28

Family

ID=37057154

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/017609 WO2006121966A2 (en) 2005-05-06 2006-05-08 Light focusing systems with extended depth of focus

Country Status (1)

Country Link
WO (1) WO2006121966A2 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5289231A (en) * 1991-12-25 1994-02-22 Nikon Corporation Apparatus for manufacturing disc medium
WO2001024173A1 (en) * 1999-09-29 2001-04-05 Richard Jenkin A Single laser pickup for use with cd, dvd and cd-r discs
US6330118B1 (en) * 1999-04-08 2001-12-11 Aerial Imaging Corporation Dual focus lens with extended depth of focus
US20030013040A1 (en) * 2000-03-02 2003-01-16 Koichiro Kishima Method for producing recording medium, method for producing stamper of recording medium, apparatus for producing recording medium, and apparatus for producing stamper of recording medium
US20040257543A1 (en) * 2003-05-30 2004-12-23 Dowski Edward Raymond Lithographic systems and methods with extended depth of focus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5289231A (en) * 1991-12-25 1994-02-22 Nikon Corporation Apparatus for manufacturing disc medium
US6330118B1 (en) * 1999-04-08 2001-12-11 Aerial Imaging Corporation Dual focus lens with extended depth of focus
WO2001024173A1 (en) * 1999-09-29 2001-04-05 Richard Jenkin A Single laser pickup for use with cd, dvd and cd-r discs
US20030013040A1 (en) * 2000-03-02 2003-01-16 Koichiro Kishima Method for producing recording medium, method for producing stamper of recording medium, apparatus for producing recording medium, and apparatus for producing stamper of recording medium
US20040257543A1 (en) * 2003-05-30 2004-12-23 Dowski Edward Raymond Lithographic systems and methods with extended depth of focus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"MULTIPLE FOCI OBJECTIVE LENS", IBM TECHNICAL DISCLOSURE BULLETIN, IBM CORP. NEW YORK, US, vol. 38, no. 5, 1 May 1995 (1995-05-01), pages 599 - 600, XP000519696, ISSN: 0018-8689 *

Also Published As

Publication number Publication date
WO2006121966A2 (en) 2006-11-16

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