WO1994009390A1 - Agencements d'imagerie tridimensionnelle - Google Patents

Agencements d'imagerie tridimensionnelle Download PDF

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Publication number
WO1994009390A1
WO1994009390A1 PCT/GB1993/002099 GB9302099W WO9409390A1 WO 1994009390 A1 WO1994009390 A1 WO 1994009390A1 GB 9302099 W GB9302099 W GB 9302099W WO 9409390 A1 WO9409390 A1 WO 9409390A1
Authority
WO
WIPO (PCT)
Prior art keywords
array
image
arrangement according
image display
image capture
Prior art date
Application number
PCT/GB1993/002099
Other languages
English (en)
Inventor
Neil Davies
Malcolm Mccormick
Original Assignee
De Montfort University
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 De Montfort University filed Critical De Montfort University
Priority to AU51529/93A priority Critical patent/AU5152993A/en
Priority to GB9507065A priority patent/GB2286313B/en
Publication of WO1994009390A1 publication Critical patent/WO1994009390A1/fr

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G02B3/0062—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between
    • G02B3/0068—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between arranged in a single integral body or plate, e.g. laminates or hybrid structures with other optical elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
    • H04N13/307—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using fly-eye lenses, e.g. arrangements of circular lenses
    • 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
    • H04N13/232—Image signal generators using stereoscopic image cameras using a single 2D image sensor using fly-eye lenses, e.g. arrangements of circular lenses

Definitions

  • This invention relates to three-dimensional image arrangements.
  • Endoscopes which are used for viewing difficult- to-access objects, have restricted imaging capability.
  • the present invention provides image arrangements that can produce orthoscopic, three-dimensional images and which have other advantages over conventional endoscopes.
  • the invention comprises a three-dimensional image capture arrangement comprising a high definition image capture device overlain by a microlens array.
  • the image capture device may comprise a CCD array.
  • the arrangement may comprise an optical system defining an object region of which an image is cast on to the microlens array.
  • the optical system may comprise negative lens means.
  • the lenses of the microlens array may be apertured - this can increase depth of focus, a corresponding reduction in brightness of image being of little concern if an electronic image can be adjusted for brightness or intensified.
  • the invention also comprises a three-dimensional image display arrangement using image information captured by an image capture arrangement as above referred to, comprising a high definition image display screen overlain by a lens array, the screen and lens array being congruent to the image capture device and microlens array in the image capture arrangement.
  • the image display arrangement may comprise a double integral screen in front of the lens array and disposed so as to intercept and invert the spatial sense of the aerial image projected by the lens array so that it can be viewed as an orthoscopic, three-dimensional image.
  • the image display screen may comprise a led array, which may be back-lit, as with collimated illumination on to a backing micro-diffuser screen.
  • Figure 1 is a diagrammatic cross-section of an image capture arrangement
  • Figure 2 is a diagrammatic cross-section of an image display arrangement.
  • the drawings illustrate a three-dimensional image capture arrangement ( Figure 1) comprising a high definition image capture device 11 overlain by a microlens array 12.
  • the image capture device 11 comprises a CCD array.
  • the arrangement comprises an optical system comprising a negative lens 13 defining an object region OR of which an image is cast on to the microlens array 12.
  • the CCD array can be 10 mm in diameter and the microlens array 12 of 400 um pitch.
  • high definition is meant that beneath each microlens of the array 12 there is an array of pixel image elements sufficient to form an image to a desired resolution of the object region OR.
  • the negative lens 13 can be located 10 mm from the microlens array 12 and have an aperture of f25. Each of the microlenses of the array 12 can have an aperture of f3, a focal length of 1.18 mm. The object region OR will then have a depth of 15 mm.
  • the microlenses of the array 12 can be apertured to increase depth of focus. This will reduce image intensity for a given object illumination, but that may be compensated electronically.
  • the signals from the CCD array 11 will be collected and processed electronically in the usual way and used to power the image display arrangement of Figure 2.
  • This comprises a high definition image display screen 21 overlain by a lens array 22.
  • the screen 21 and lens array 22 are congruent to the image capture device 11 and microlens array 12 of the image capture arrangement illustrated in Figure 1, by which is meant that the number and arrangement of lenses are the same and that the pixels of the led screen correspond in number and arrangement to those of the CCD array.
  • the led screen 22 can have four times as many pixels as the CCD array 12 so that there will be some redundancy, and the correlation may differ in other ways so long as the image under each microlens of the array 12 is satisfactorily transmitted to appear under each lens of the array 22 in a corresponding position.
  • the led screen 21 and lens array 22 can be ten times the size of the CCD array 11 and microlens screen
  • the lenses of array 22 being of 4 mm pitch and the diameter being 100 mm.
  • the screen 21 and lens array 22 are viewed through a double integral screen 23 with f2 microlenses 23a pitched at 400 urn (see enlarged detail located 250 mm in front) .
  • the image as seen through the double integral screen 23 is inverted from the pseudoscopic image projected by the lens array 22 so that it is viewed as an orthoscopic, three-dimensional image in an image region IR which, at 150 mm depth, is ten times the depth of the object region OR ( Figure 1).
  • the led screen 21 is back-lit with collimated illumination on to a backing micro-diffuser screen 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

L'invention se rapporte à un agencement d'imagerie tridimensionnelle, comprenant un dispositif de prise d'images à haute définition, recouvert d'un alignement de microlentilles.
PCT/GB1993/002099 1992-10-16 1993-10-11 Agencements d'imagerie tridimensionnelle WO1994009390A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU51529/93A AU5152993A (en) 1992-10-16 1993-10-11 Three-dimensional image arrangements
GB9507065A GB2286313B (en) 1992-10-16 1993-10-11 Three-dimensional image arrangements

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9221812.2 1992-10-16
GB929221812A GB9221812D0 (en) 1992-10-16 1992-10-16 Three-dimensional image arrangements

Publications (1)

Publication Number Publication Date
WO1994009390A1 true WO1994009390A1 (fr) 1994-04-28

Family

ID=10723593

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1993/002099 WO1994009390A1 (fr) 1992-10-16 1993-10-11 Agencements d'imagerie tridimensionnelle

Country Status (3)

Country Link
AU (1) AU5152993A (fr)
GB (2) GB9221812D0 (fr)
WO (1) WO1994009390A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1073781C (zh) * 1996-01-18 2001-10-24 余桂丰 立体电视摄像与播放接收系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0285796A1 (fr) * 1987-03-02 1988-10-12 Honeywell Inc. Système optique de télémétrie
EP0309948A2 (fr) * 1987-09-28 1989-04-05 Honeywell Inc. Réseau de lentilles et méthode de réalisation des ouvertures sur les réseaux de lentilles
WO1990013981A1 (fr) * 1989-05-12 1990-11-15 Winnek Douglas Fredwill Television tridimensionnelle de haute definition

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0285796A1 (fr) * 1987-03-02 1988-10-12 Honeywell Inc. Système optique de télémétrie
EP0309948A2 (fr) * 1987-09-28 1989-04-05 Honeywell Inc. Réseau de lentilles et méthode de réalisation des ouvertures sur les réseaux de lentilles
WO1990013981A1 (fr) * 1989-05-12 1990-11-15 Winnek Douglas Fredwill Television tridimensionnelle de haute definition

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
M. DEGUCHI: "Microlens design using simulation program for CCD image sensor", IEEE TRANSACTIONS ON CONSUMER ELECTRONICS, vol. 38, no. 3, August 1992 (1992-08-01), NEW YORK US, pages 583 - 588 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1073781C (zh) * 1996-01-18 2001-10-24 余桂丰 立体电视摄像与播放接收系统

Also Published As

Publication number Publication date
AU5152993A (en) 1994-05-09
GB9507065D0 (en) 1995-05-31
GB9221812D0 (en) 1992-12-02
GB2286313A (en) 1995-08-09
GB2286313B (en) 1996-07-10

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