CA2347253A1 - Method and apparatus for determining optical distance - Google Patents

Method and apparatus for determining optical distance

Info

Publication number
CA2347253A1
CA2347253A1 CA002347253A CA2347253A CA2347253A1 CA 2347253 A1 CA2347253 A1 CA 2347253A1 CA 002347253 A CA002347253 A CA 002347253A CA 2347253 A CA2347253 A CA 2347253A CA 2347253 A1 CA2347253 A1 CA 2347253A1
Authority
CA
Canada
Prior art keywords
light
distance
pixel
spot
vfl
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.)
Granted
Application number
CA002347253A
Other languages
French (fr)
Other versions
CA2347253C (en
Inventor
Charles D. Melville
Michael Tidwell
Richard S. Johnston
Joel S. Kollin
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.)
University of Washington
Original Assignee
University Of Washington
Charles D. Melville
Michael Tidwell
Richard S. Johnston
Joel S. Kollin
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 University Of Washington, Charles D. Melville, Michael Tidwell, Richard S. Johnston, Joel S. Kollin filed Critical University Of Washington
Publication of CA2347253A1 publication Critical patent/CA2347253A1/en
Application granted granted Critical
Publication of CA2347253C publication Critical patent/CA2347253C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • G02B27/10—Beam splitting or combining systems
    • G02B27/14—Beam splitting or combining systems operating by reflection only
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/12—Systems for determining distance or velocity not using reflection or reradiation using electromagnetic waves other than radio waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C3/00—Measuring distances in line of sight; Optical rangefinders
    • G01C3/02—Details
    • G01C3/06—Use of electric means to obtain final indication
    • G01C3/08—Use of electric radiation detectors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/20—Image signal generators
    • H04N13/204—Image signal generators using stereoscopic image cameras
    • H04N13/207—Image signal generators using stereoscopic image cameras using a single 2D image sensor
    • H04N13/236—Image signal generators using stereoscopic image cameras using a single 2D image sensor using varifocal lenses or mirrors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Electromagnetism (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Optics & Photonics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Automatic Focus Adjustment (AREA)
  • Microscoopes, Condenser (AREA)
  • Image Input (AREA)
  • Measurement Of Optical Distance (AREA)
  • Structure And Mechanism Of Cameras (AREA)
  • Exposure Control For Cameras (AREA)
  • Focusing (AREA)
  • Lens Barrels (AREA)
  • Mechanical Optical Scanning Systems (AREA)

Abstract

Apparent distance of a pixel within an optical field of view F is determined. Incoming light is scanned along a raster pattern to direct light for a select pixel onto a light distance detector (36). The distance is sampled for each pixel or for a group of pixels. The light distance detector includes a concentric set of rings sensors (42-50). The larger the spot of light corresponding to the pixel, the more rings are impinged.
The diameter of the spot is proportional to the distance at which the light originated (e.g., light source or object from which light was reflected).
Alternatively, a variable focus lens (VFL) 62/70/80 adjusts focal length for a given pixel to achieve a standard spot size. The distance at which the light originated correlates to the focal length of the VFL.
CA002347253A 1998-11-09 1999-11-02 Method and apparatus for determining optical distance Expired - Fee Related CA2347253C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/188,991 US6191761B1 (en) 1998-11-09 1998-11-09 Method and apparatus for determining optical distance
US09/188,991 1998-11-09
PCT/US1999/025689 WO2000028371A1 (en) 1998-11-09 1999-11-02 Method and apparatus for determining optical distance

Publications (2)

Publication Number Publication Date
CA2347253A1 true CA2347253A1 (en) 2000-05-18
CA2347253C CA2347253C (en) 2004-03-30

Family

ID=22695443

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002347253A Expired - Fee Related CA2347253C (en) 1998-11-09 1999-11-02 Method and apparatus for determining optical distance

Country Status (7)

Country Link
US (4) US6191761B1 (en)
EP (1) EP1129383A4 (en)
JP (1) JP2002529792A (en)
KR (1) KR100704083B1 (en)
AU (1) AU758750B2 (en)
CA (1) CA2347253C (en)
WO (1) WO2000028371A1 (en)

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Also Published As

Publication number Publication date
AU758750B2 (en) 2003-03-27
US20060077121A1 (en) 2006-04-13
AU1811000A (en) 2000-05-29
US6977631B2 (en) 2005-12-20
WO2000028371A1 (en) 2000-05-18
CA2347253C (en) 2004-03-30
JP2002529792A (en) 2002-09-10
EP1129383A1 (en) 2001-09-05
US20010001240A1 (en) 2001-05-17
US20030016187A1 (en) 2003-01-23
US6492962B2 (en) 2002-12-10
US6191761B1 (en) 2001-02-20
EP1129383A4 (en) 2006-04-26
KR20010092724A (en) 2001-10-26
KR100704083B1 (en) 2007-04-05

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