EP1468472A1 - Optical disc head including a bowtie grating antenna and slider for optical focusing, and method for making - Google Patents
Optical disc head including a bowtie grating antenna and slider for optical focusing, and method for makingInfo
- Publication number
- EP1468472A1 EP1468472A1 EP02790119A EP02790119A EP1468472A1 EP 1468472 A1 EP1468472 A1 EP 1468472A1 EP 02790119 A EP02790119 A EP 02790119A EP 02790119 A EP02790119 A EP 02790119A EP 1468472 A1 EP1468472 A1 EP 1468472A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- slider
- gratings
- shaped surface
- grating
- illumination
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
- H01Q9/285—Planar dipole
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
-
- 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
- G11B7/122—Flying-type heads, e.g. analogous to Winchester type in magnetic 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
- G11B7/12—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
- G11B7/1387—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector using the near-field effect
-
- 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
- G11B7/22—Apparatus or processes for the manufacture of optical heads, e.g. assembly
Definitions
- the present invention relates to optic antennas, optics lenses, and the positioning of electromagnetic readers and writers. More particularly, it relates to the use of microlayered optical lenses and shaped surfaces, a portion of which contains a continuously varied surface, coupled with an amplifying grating antenna as an optical head to create a localized optical spot of desired polarization, at a desired distance with a maximum peak in intensity.
- the storage of information in magnetized medium often is limited by the spot size of light intensity focused at the desired storage location.
- the intensity loosens the polarization of the medium so that a logical/analog bit may be stored.
- a disadvantage of multiple solid antennas is that the re-radiated field becomes depolarized during the superposition process resulting in lower than desired maximum peak in the irradiated field and a larger than desired spot size at the desired distance from the antenna.
- a system/device/method which can create a smaller spot size, while maintaining the polarization, can enable the storage and reading of larger amounts of data.
- Figure 6 shows a conventional system, 600, for channeling a focused optical beam 660 onto a localized spot (760 in Figure 7).
- the device is a layer of silicon 610 upon which several layers of metal are deposited 620 and 630. Underneath one of the layers is deposited a waveguide 640 containing either a hole or a different index of refraction material 650. The device is turned on its side and used to channel/guide an optical beam 660 to a desired spot on a recording media.
- an integrated delivery system providing optimum spacing between the target medium and the read/write head alone or in conjunction with a system/device/method that can create a smaller spot size, while maintaining the polarization, can enable the storage and reading of larger amounts of data in a cheaper and more reliable fashion than previous systems.
- a method of slider fabrication in accordance with the present invention contains the steps of: providing a mold having a negative of a predetermined shaped surface pattern; providing a curable substance; placing the curable substance in the mold; and curing the curable substance with the mold producing a shaped surface on the curable substance having a shape corresponding to the predetermined shaped surface pattern, where the predetermined shaped surface is chosen to produce a slider providing sufficient lift to a write/read system to obtain a predetermined distance above a storage medium.
- Figures 1 and 2 illustrate a conventional solid bowtie antenna system
- Figure 3 illustrates the preferred embodiment of a grating antenna according to the present invention
- Figure 12 illustrates an alternative embodiment present invention with a gray scale slider integrated with a conventional read/write system
- Figures 13A and 13B illustrate various combinations of the positioning of the gray scale slider with respect to the read/write head on the surface facing the target medium
- the initial illumination can be provided by coherent, semi-coherent, or incoherent illumination systems (e.g., lasers, VIXELS, focused lamp systems and other like coherent, incoherent or semi-coherent illumination sources) depending on whether the spot size polarization is important for the particular use of the invention and provided a portion of the illumination contains wavelengths that are larger than the grating separation. Additionally the illumination source can be integrated with the delivery system on a single substrate.
- coherent, semi-coherent, or incoherent illumination systems e.g., lasers, VIXELS, focused lamp systems and other like coherent, incoherent or semi-coherent illumination sources
- the amplifying grating antenna 850 will produce a spot on a target medium (970 in Figure 9).
- the polarization of the medium may be defined by the driving a read/write circuit 860 as would occur to one of ordinary skill in the art.
- the grayscale slider is a micro machined shaped surface 880 that provides lift to the delivery system 800 when the delivery system is moved with respect to the target medium (970 in Figure 9).
- the shaped surface 880 can be micro-formed or gray scale plasma etched, in which case it is referred to as a gray scale slider.
- the shaped surface can also be molded using a master mold and either a pressing method where the slider material is pressure stamped, or a curing method where the mold holds a curable substance that takes the shape of the mold upon curing.
- referral is often made to a gray scale slider it is intended that the scope of the slider encompass any shaped surface that is attached or integrated into to the delivery system used to provide lift when moved relative to a target medium.
- the discussion herein should not be interpreted to limit the slider to a gray scale slider formed by gray scale processes.
- the shaped surface 880 can be gradually curved, or stepped, or any combination of shapes needed to acquire the desired lift characteristics.
- the amplifying grating antenna 850 can have various shapes and sizes and the discussion herein should certainly not be interpreted to limit the antenna to a triangular shape. It is intended that gratings of various shapes forming an antenna be intended to lie within the scope of the present invention.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US33910301P | 2001-12-13 | 2001-12-13 | |
US339103P | 2001-12-13 | ||
PCT/US2002/039862 WO2003052870A1 (en) | 2001-12-13 | 2002-12-13 | Optical disc head including a bowtie grating antenna and slider for optical focusing, and method for making |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1468472A1 true EP1468472A1 (en) | 2004-10-20 |
EP1468472A4 EP1468472A4 (en) | 2005-03-16 |
Family
ID=23327511
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02790119A Withdrawn EP1468472A4 (en) | 2001-12-13 | 2002-12-13 | Optical disc head including a bowtie grating antenna and slider for optical focusing, and method for making |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1468472A4 (en) |
JP (1) | JP2005513845A (en) |
KR (1) | KR20040088028A (en) |
AU (1) | AU2002353141A1 (en) |
WO (1) | WO2003052870A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4330575B2 (en) | 2005-03-17 | 2009-09-16 | 富士通株式会社 | Tag antenna |
US8193994B2 (en) * | 2006-05-23 | 2012-06-05 | Intel Corporation | Millimeter-wave chip-lens array antenna systems for wireless networks |
CN106486734B (en) * | 2016-11-03 | 2019-02-26 | 合肥工业大学 | Antenna system with gain self-correcting function |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5125750A (en) * | 1991-03-14 | 1992-06-30 | The Board Of Trustees Of The Leland Stanford Junior University | Optical recording system employing a solid immersion lens |
US5497359A (en) * | 1994-08-30 | 1996-03-05 | National Business Machines Corporation | Optical disk data storage system with radiation-transparent air-bearing slider |
US5696372A (en) * | 1996-07-31 | 1997-12-09 | Yale University | High efficiency near-field electromagnetic probe having a bowtie antenna structure |
WO1999064929A1 (en) * | 1998-06-09 | 1999-12-16 | Rochester Photonics Corporation | Methods of making optical microstructures which can have profile heights exceeding fifteen microns |
US20010009541A1 (en) * | 1999-12-28 | 2001-07-26 | Fuiji Xerox Co., Ltd. | Optical head, magneto-optical head, disk apparatus and manufacturing method of optical head |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5432374A (en) * | 1993-02-08 | 1995-07-11 | Santa Barbara Research Center | Integrated IR and mm-wave detector |
US6091374A (en) * | 1997-09-09 | 2000-07-18 | Time Domain Corporation | Ultra-wideband magnetic antenna |
US6407708B1 (en) * | 2000-09-01 | 2002-06-18 | The United States Of America As Represented By The Secretary Of The Army | Microwave generator/radiator using photoconductive switching and dielectric lens |
-
2002
- 2002-12-13 JP JP2003553661A patent/JP2005513845A/en active Pending
- 2002-12-13 EP EP02790119A patent/EP1468472A4/en not_active Withdrawn
- 2002-12-13 WO PCT/US2002/039862 patent/WO2003052870A1/en not_active Application Discontinuation
- 2002-12-13 KR KR10-2004-7009037A patent/KR20040088028A/en not_active Application Discontinuation
- 2002-12-13 AU AU2002353141A patent/AU2002353141A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5125750A (en) * | 1991-03-14 | 1992-06-30 | The Board Of Trustees Of The Leland Stanford Junior University | Optical recording system employing a solid immersion lens |
US5497359A (en) * | 1994-08-30 | 1996-03-05 | National Business Machines Corporation | Optical disk data storage system with radiation-transparent air-bearing slider |
US5696372A (en) * | 1996-07-31 | 1997-12-09 | Yale University | High efficiency near-field electromagnetic probe having a bowtie antenna structure |
WO1999064929A1 (en) * | 1998-06-09 | 1999-12-16 | Rochester Photonics Corporation | Methods of making optical microstructures which can have profile heights exceeding fifteen microns |
US20010009541A1 (en) * | 1999-12-28 | 2001-07-26 | Fuiji Xerox Co., Ltd. | Optical head, magneto-optical head, disk apparatus and manufacturing method of optical head |
Non-Patent Citations (2)
Title |
---|
GROSSMAN E N ED - INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS: "LITHOGRAPHIC ANTENNAS FOR SUBMILLIMETER AND INFRARED FREQUENCIES" EMC - A GLOBAL CONCERN. IEEE 1995 INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY. ATLANTA, AUG. 14 - 18, 1995, INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY, NEW YORK, IEEE, US, 14 August 1995 (1995-08-14), pages 102-107, XP000595982 ISBN: 0-7803-2574-5 * |
See also references of WO03052870A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU2002353141A1 (en) | 2003-06-30 |
KR20040088028A (en) | 2004-10-15 |
JP2005513845A (en) | 2005-05-12 |
EP1468472A4 (en) | 2005-03-16 |
WO2003052870A1 (en) | 2003-06-26 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20040713 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR |
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A4 | Supplementary search report drawn up and despatched |
Effective date: 20050202 |
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RIC1 | Information provided on ipc code assigned before grant |
Ipc: 7H 01Q 1/38 B Ipc: 7H 01Q 9/16 A Ipc: 7H 01Q 15/08 B Ipc: 7G 11B 7/135 B Ipc: 7H 01Q 9/28 B Ipc: 7G 12B 21/06 B |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20070703 |