WO2002046800A3 - Optical configuration for focus sensing - Google Patents

Optical configuration for focus sensing Download PDF

Info

Publication number
WO2002046800A3
WO2002046800A3 PCT/US2001/044926 US0144926W WO0246800A3 WO 2002046800 A3 WO2002046800 A3 WO 2002046800A3 US 0144926 W US0144926 W US 0144926W WO 0246800 A3 WO0246800 A3 WO 0246800A3
Authority
WO
WIPO (PCT)
Prior art keywords
light
focus
spots
scanning
waveguides
Prior art date
Application number
PCT/US2001/044926
Other languages
French (fr)
Other versions
WO2002046800A2 (en
Inventor
Newell Convers Wyeth
Edward Alan Phillips
Original Assignee
Science Applic Int 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
Priority claimed from US09/995,630 external-priority patent/US6614957B2/en
Application filed by Science Applic Int Corp filed Critical Science Applic Int Corp
Priority to AU2002227054A priority Critical patent/AU2002227054A1/en
Publication of WO2002046800A2 publication Critical patent/WO2002046800A2/en
Publication of WO2002046800A3 publication Critical patent/WO2002046800A3/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
    • G11B7/14—Heads, e.g. forming of the optical beam spot or modulation of the optical beam specially adapted to record on, or to reproduce from, more than one track simultaneously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
    • B41J2/44—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using single radiation source per colour, e.g. lighting beams or shutter arrangements
    • B41J2/442—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using single radiation source per colour, e.g. lighting beams or shutter arrangements using lasers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/10—Scanning systems
    • G02B26/12—Scanning systems using multifaceted mirrors
    • G02B26/123—Multibeam scanners, e.g. using multiple light sources or beam splitters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
    • 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
    • G11B7/123—Integrated head arrangements, e.g. with source and detectors mounted on the same substrate
    • G11B7/124—Integrated head arrangements, e.g. with source and detectors mounted on the same substrate the integrated head arrangements including waveguides
    • 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
    • G11B7/1384—Fibre optics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
    • H04N1/0281—Details of scanning heads ; Means for illuminating the original for picture information pick-up with means for collecting light from a line or an area of the original and for guiding it to only one or a relatively low number of picture element detectors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B2006/0098—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings for scanning
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
    • G02B6/422—Active alignment, i.e. moving the elements in response to the detected degree of coupling or position of the elements
    • G02B6/4221—Active alignment, i.e. moving the elements in response to the detected degree of coupling or position of the elements involving a visual detection of the position of the elements, e.g. by using a microscope or a camera
    • G02B6/4224—Active alignment, i.e. moving the elements in response to the detected degree of coupling or position of the elements involving a visual detection of the position of the elements, e.g. by using a microscope or a camera using visual alignment markings, e.g. index methods
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4249—Packages, e.g. shape, construction, internal or external details comprising arrays of active devices and fibres
    • G02B6/425—Optical features

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Lenses (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

The present invention makes use of integrated optical or fiber optical systems in focusing scanner applications more practical by utilizing an all-waveguide system design (50) without the need for a conventional, discrete optic focus-sensing subsystem. In addition, the invention uses the limited light acceptance properties of single-mode waveguides (20, 30) to eliminate interfering signals from reflections produced by other light spots scanning nearby areas of the surface in parallel ('crosstalk') or from ambient light (noise). The invention produces focus-error feedback signals necessary to maintain a focused light spot that is scanned over an area of interest. The invention may be used with scanner designs that use single-mode optical fibers or integrated optical waveguides (10, 20, 30) as the sources imaged as spots for scanning.
PCT/US2001/044926 2000-12-08 2001-11-30 Optical configuration for focus sensing WO2002046800A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002227054A AU2002227054A1 (en) 2000-12-08 2001-11-30 Optical configuration for focus sensing

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
US25187800P 2000-12-08 2000-12-08
US25186300P 2000-12-08 2000-12-08
US60/251,878 2000-12-08
US60/251,863 2000-12-08
US94259101A 2001-08-31 2001-08-31
US09/942,591 2001-08-31
US09/995,630 US6614957B2 (en) 2000-12-08 2001-11-29 Optical configuration for improved lens performance
US09/, 2001-11-29

Publications (2)

Publication Number Publication Date
WO2002046800A2 WO2002046800A2 (en) 2002-06-13
WO2002046800A3 true WO2002046800A3 (en) 2003-04-10

Family

ID=27500408

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/US2001/044926 WO2002046800A2 (en) 2000-12-08 2001-11-30 Optical configuration for focus sensing
PCT/US2001/044954 WO2002059667A1 (en) 2000-12-08 2001-11-30 Optical configuration for improved lens performance

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/US2001/044954 WO2002059667A1 (en) 2000-12-08 2001-11-30 Optical configuration for improved lens performance

Country Status (2)

Country Link
AU (1) AU2002227054A1 (en)
WO (2) WO2002046800A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2865548A1 (en) * 2004-01-27 2005-07-29 Commissariat Energie Atomique Opto-mechanical device for e.g. micro-endoscope, has central fixed optical guide and movable support with two optical guides, where fixed guide and one movable guide are aligned corresponding to propagation axis of light beams

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5278812A (en) * 1992-02-18 1994-01-11 At&T Bell Laboratories Tracking and focussing functions in optical disk apparatus
US5289454A (en) * 1991-12-19 1994-02-22 Minnesota Mining And Manufacturing Company Optical disc addressing devices a method of use thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63130720U (en) * 1987-02-17 1988-08-26
US6215593B1 (en) * 1996-11-13 2001-04-10 Ian A. Bruce Portable wide-field optical system with microlenses and fiber-optic image transfer element

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5289454A (en) * 1991-12-19 1994-02-22 Minnesota Mining And Manufacturing Company Optical disc addressing devices a method of use thereof
US5278812A (en) * 1992-02-18 1994-01-11 At&T Bell Laboratories Tracking and focussing functions in optical disk apparatus

Also Published As

Publication number Publication date
WO2002046800A2 (en) 2002-06-13
AU2002227054A1 (en) 2002-06-18
WO2002059667A1 (en) 2002-08-01

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