[go: up one dir, main page]

WO2000045608A1 - Detecteur optique - Google Patents

Detecteur optique Download PDF

Info

Publication number
WO2000045608A1
WO2000045608A1 PCT/US2000/001191 US0001191W WO0045608A1 WO 2000045608 A1 WO2000045608 A1 WO 2000045608A1 US 0001191 W US0001191 W US 0001191W WO 0045608 A1 WO0045608 A1 WO 0045608A1
Authority
WO
WIPO (PCT)
Prior art keywords
field
view
operable
light
holographic
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.)
Ceased
Application number
PCT/US2000/001191
Other languages
English (en)
Inventor
Milan M. Popovich
Jonathan D. Waldern
Michael R. Adams
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.)
DigiLens Inc
Original Assignee
DigiLens Inc
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 DigiLens Inc filed Critical DigiLens Inc
Priority to AU27300/00A priority Critical patent/AU2730000A/en
Publication of WO2000045608A1 publication Critical patent/WO2000045608A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/32—Holograms used as optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/21—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  by interference
    • G02F1/216—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  by interference using liquid crystals, e.g. liquid crystal Fabry-Perot filters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/58—Means for changing the camera field of view without moving the camera body, e.g. nutating or panning of optics or image sensors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
    • G02F1/13342—Holographic polymer dispersed liquid crystals
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/30—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 grating
    • G02F2201/307—Reflective grating, i.e. Bragg grating

Definitions

  • the present invention relates generally to optical sensors, and more particularly, to optical sensors operable to image different fields of views.
  • panoramic cameras Many applications such as surveillance systems and video conferencing utilize panoramic cameras.
  • the problem of acquiring panoramic images has been treated extensively over the years and multiple commercial products have been developed.
  • a number of prior art approaches employ complex catadioptric systems with multiple aspherical reflective and refractive optical elements. These imaging systems are typically very expensive to produce due to the large number of custom elements.
  • Panoramic images have also been created by synthesizing frames taken by multiple cameras or by a single camera at successive adjacent intervals. However, a single camera that scans introduces undesirable artifacts for moving images and the use of multiple cameras quickly becomes cost prohibitive.
  • An optical system for detecting an image comprises at least two optical devices switchable between an active state wherein light is diffracted by the holographic device and a passive state wherein light is not diffracted by the holographic device, and a detector operable to detect light impinging upon a surface thereof.
  • a first of the two optical devices is operable in its active state to diffract light passing therethrough to form on the detector an image of a first field of view and a second of the two optical devices is operable in its active state to diffract light passing therethrough to form on the detector an image of a second field of view.
  • the second field of view is different from the first field of view.
  • the optical devices may include holographic optical elements having a hologram recorded therein optimized to diffract red, green, or blue light.
  • the holographic optical element may also be configured to diffract infrared or ultraviolet light.
  • Fig. 1 is a schematic of an optical sensor of a first embodiment of the present invention configured for forming an image of a relatively wide field of view.
  • Fig. 2 is a schematic of the optical sensor of Fig. 1 configured for forming an image of an off-center field of view.
  • Fig. 3 is a schematic of the optical sensor of Fig. 1 configured for forming an image of a relatively narrow field of view.
  • Fig. 4 is schematic of a holographic device of the optical sensor shown in Figs. 1-3.
  • Fig. 5 is a perspective view of a holographic optical element of the holographic device of Fig. 4.
  • Fig. 6 is a partial front view of the holographic optical element of Fig. 5 showing an electrode and electric circuit of the holographic optical element.
  • Fig. 7 is a schematic of the holographic device of Fig. 4 with three holographic optical elements each optimized to diffract red, green, or blue light and a controller operable to switch each of the holographic optical elements between an active state and a passive state.
  • Fig. 8 is a schematic of a second embodiment of the optical sensor of Fig. 1 configured to form images with different fields of view on different areas of a light detector.
  • the optical sensor 20 may be used, for example, in video surveillance, robotics, video conferencing, or panoramic imaging.
  • the optical sensor 20 includes a light sensitive detector 22, an optical system, generally indicated at 24, comprising dynamic optical devices, and a controller 32 for controlling the optical devices.
  • the optical system 24 is preferably positioned on a common optical axis with the detector 22.
  • the optical system 24 described below includes switchable holographic devices, 26, 28, 30 however, it is to be understood that other dynamic optical devices may be used, without departing from the scope of the invention.
  • a dynamic optical device includes devices which are capable of being switched from a state in which it performs a specified optical function (e.g., imaging) to a state in which it has minimal effect on incident light.
  • a specified optical function e.g., imaging
  • light includes infrared and ultra-violet light, as well as light in the visible spectrum.
  • the holographic devices 26, 28, 30 are each configured to form an image of a different field of view on the detector 22.
  • the controller 32 is operable to switch each of the holographic devices 26, 28, 30 between a passive state in which the device has substantially no impact on incoming light and an active state in which the device diffracts light to form an image on the detector 22.
  • the optical system 24 will form an image having a relatively wide
  • angular FOVcci central field of view
  • angular FOV ⁇ 2 off-center field of view
  • angular FOV ⁇ 2 off-center field of view
  • angular FOV ⁇ 2 off-center field of view
  • Fig. 1 shows device 28 in its active state and devices 26 and
  • Fig. 2 shows device 26 in its active state and devices 28 and 30 in their passive states
  • Fig. 3 shows device 30 in its active state and devices 26 and 28 in their passive states.
  • Images corresponding to different fields of view are selectively projected onto the detector 22 by switching the holographic devices 26, 28, 30 between their passive and active states.
  • the field of view is determined by the angular bandwidth of the holographic device 26, 28, 30 which is defined by the recording of holographic optical elements within the device.
  • the holographic device 30 may also be configured to provide magnification along with a focusing function so that switching between devices 28 and 30 creates images corresponding to a wide field of view and a selected area of interest contained within that wide field of view, for example.
  • Fig. 4 schematically illustrates one of the holographic devices 26 of the optical system 24 shown in Figs. 1-3.
  • the holographic devices 26, 28, 30 are essentially identical, except for the interference fringes recorded in the holographic optical elements of the devices. Therefore, only device 26 will be described in detail.
  • the holographic device 26 includes three holographic optical elements 36, 38, 40 which are selectively activated and deactivated to transmit a resultant image which is formed by sequentially manipulating different colors (Fig. 4).
  • the holographic optical element 36, 38, 40 is passive all light incident on the element is transmitted substantially unaltered through the element.
  • the holographic optical element 36, 38, 40 is active, a portion of the light incident on the holographic element within the angular wavelength and bandwidth of the holographic
  • optical element is diffracted such that the diffracted light is incident on the detector 22.
  • the holographic optical elements 36, 38, 40 each include a hologram interposed between two electrodes 52 (Figs. 5 and 6).
  • the hologram may be a Bragg (thick or volume) hologram or Raman-Nath (thin) hologram.
  • Raman- Nath holograms require less voltage to switch light between various modes of the hologram than Bragg holograms, however, Raman-Nath holograms are not as efficient as Bragg holograms.
  • the hologram is used to control transmitted light beams based on the principles of diffraction.
  • the hologram selectively directs an incoming light beam 46 either towards or away from a viewer and selectively diffracts light at certain wavelengths into different modes in response to a voltage applied to the electrodes 52.
  • Light passing through the hologram in the same direction as the light is received is referred to as the zeroth (0th) order mode 48 (Fig. 5).
  • liquid crystal droplets within the holographic optical element 36, 38, 40 are oriented such that the hologram is present in the element and light is diffracted from the zeroth order mode to a first (1st) order mode 50 of the hologram.
  • a voltage is applied to the holographic optical element 36, 38, 40, the liquid crystal droplets become realigned effectively erasing the hologram, and the incoming light passes through the holographic optical element in the zeroth order mode 48.
  • the holographic optical elements 36, 38, 40 may also be reflective rather than transmissive as shown in Figure 5 and described above.
  • the arrangement of the holographic device and optical components would be modified to utilize reflective properties of the hologram rather than the transmissive properties described herein.
  • the light that passes through the hologram is diffracted by interference fringes recorded in the hologram to form an image.
  • the hologram is able to perform various optical functions which are associated with traditional optical elements, such as lenses and prisms, as well as more sophisticated optical operations.
  • the hologram may be configured to perform operations such as deflection, focusing, magnification, or color filtering of the light, for example.
  • the holograms are preferably recorded on a photopolymer/liquid crystal composite material (emulsion) 60 such as a holographic photopolymeric film which has been combined with liquid crystal, for example (Fig. 6).
  • a photopolymer/liquid crystal composite material (emulsion) 60 such as a holographic photopolymeric film which has been combined with liquid crystal, for example (Fig. 6).
  • the presence of the liquid crystal allows the hologram to exhibit optical characteristics which are dependent on an applied electrical field.
  • the photopolymeric film may be composed of a polymerizable monomer having dipentaerythritol hydroxypentacrylate, as described in PCT Publication, Application Serial No. PCT/US97/12577, by Sutherland et al.
  • the liquid crystal may be suffused into the pores of the photopolymeric film and may include a surfactant.
  • the refractive properties of the holographic optical elements 36, 38, 40 depend primarily on the recorded holographic fringes in the photopolymeric film.
  • the interference fringes may be created by applying beams of light to the photopolymeric film. Alternatively, the interference fringes may be artificially created by using highly accurate laser writing devices or other replication techniques, as is well known by those skilled in the art.
  • the holographic fringes may be recorded in the photopolymeric film either prior to or after the photopolymeric film is combined with the liquid crystal. In the preferred embodiment, the photopolymeric material is combined with the liquid crystal prior to the recording.
  • the liquid crystal and the polymer material are pre-mixed and the phase separation takes place during the recording of the hologram, such that the holographic fringes become populated with a high concentration of liquid crystal droplets.
  • This process can be regarded as a "dry" process, which is advantageous in terms of mass production of the switchable holographic optical elements 36, 38, 40.
  • Recording of the hologram may be accomplished by a traditional optical process in which interference fringes are created by applying beams of light. Alternatively, the interference fringes may be artificially created by using highly accurate laser writing devices or other optical replication techniques.
  • the optical properties of the holographic optical elements 36, 38, 40 primarily depend on the recorded holographic fringes in the photopolymeric film.
  • the electrodes (electrode layers) 52 are positioned on opposite sides of the emulsion 60 and are preferably transparent so that they do not interfere with light passing through the hologram.
  • the electrodes 52 may be formed from a vapor deposition of Indium Tin Oxide (ITO) which typically has a transmission efficiency of greater than 80%, or any other suitable substantially transparent conducting material.
  • ITO Indium Tin Oxide
  • the electrodes 52 are connected to an electric circuit 58 operable to apply a voltage to the electrodes, to generate an electric field (Fig. 6). Initially, with no voltage applied to the electrodes 52, the hologram is in the diffractive (active) state and the holographic optical element 36, 38, 40 diffracts propagating light in a predefined manner.
  • the operating state of the hologram switches from the diffractive state to the passive state and the holographic optical element does not optically alter the propagating light.
  • the electrodes 52 may be different than described herein. For example, a plurality of smaller electrodes may be used rather than two large electrodes which substantially cover surfaces of the holograms.
  • Each holographic optical element 36, 38, 40 is holographically configured such that only a particular monochromatic light is diffracted by the hologram (Figs. 4 and 7).
  • the red optical element 36 has a hologram which is optimized to diffract red light
  • the green optical element 38 has a hologram which is optimized to diffract green light
  • the blue optical element 40 has a hologram which is optimized to diffract blue light.
  • the device controller 32 drives switching circuitry 64 associated with the electrodes 52 on each of the optical elements 36, 38, 40 to apply a voltage to the electrodes (Figs. 6 and 7).
  • the electrodes 52 are individually coupled to the device controller 32 through a voltage controller 68 which selectively provides an excitation signal to the electrodes of a selected holographic optical element 36, 38, 40, switching the hologram to the passive state.
  • the voltage controller 68 also determines the specific voltage level to be applied to each electrode 52.
  • the controller 32 operates to sequentially display three monochromatic images of the color input image.
  • the electrodes 52 attached to each of the holograms 36, 38, 40 are sequentially enabled such that a selected amount of red, green, and blue light is directed towards the viewer. For example, when a red monochromatic image is projected, the controller 32 switches the green and blue holograms 38, 40 to the passive state by applying voltages to their respective electrodes 52.
  • the supplied voltages to the electrodes 52 of the green and blue holograms 38, 40 create a potential difference between the electrodes, thereby generating an electrical field within the green and blue holograms.
  • the presence of the generated electrical field switches the optical characteristic of the holograms 38, 40 to the passive state.
  • the green and blue holograms 38, 40 in the passive state and the red hologram 36 in the diffractive state only the red hologram optically diffracts the projected red image. Thus, only the portion of the visible light spectrum corresponding to the red light is diffracted to the viewer.
  • the green hologram 38 is next changed to the diffractive state by deenergizing the corresponding electrodes 52 and the electrodes of the red hologram 36 are energized to change the red hologram to the passive state so that only green light is diffracted.
  • the blue hologram 40 is then changed to the diffractive state by deenergizing its electrodes 52 and the electrodes of the green hologram 38 are energized to change the green hologram to the passive state so that only blue light is diffracted.
  • the holograms are sequentially enabled with a refresh rate (e.g., less than 150 microseconds) which is faster than the response time of a human eye so that a color image will be created.
  • the red, green, and blue holographic elements 36, 38, 40 may be cycled on and off in any order.
  • the controller 32 is operable to switch the elements between their active and passive states in a cyclic mode such that red, green, and blue images are projected in rapid succession onto the detector 22.
  • the holographic devices 26, 28, 30 may also be configured to diffract infrared or ultra-violet light. Thus, the number of holographic optical elements within each holographic device 26, 28, 30 may be different than shown and described herein.
  • the optical sensor may be configured for sensing only ultra-violet light, in which case each holographic device would include only one holographic optical element.
  • the holographic devices 26, 28, 30 may also be configured to perform more complex optical operations.
  • a variable magnification (zoom) function may be encoded in one or more of the devices 26, 28, 30 by including an additional switchable holographic optical element.
  • the optical system 24 may also include conventional optical components to correct aberrations produced by the holograms or for relaying images to the detector 22.
  • the light-sensitive detector 22 includes a photodetector array comprising a plurality of detector elements (e.g., charge-coupled detectors (CCDs), photo capacitors, photo resistors, photo diodes, or any other suitable light-sensitive device).
  • the detector elements may be arranged in rows and columns, or other suitable arrangements.
  • the light detector 22 may communicate with a computer capable of storing information representative of the image incident on the detector, or the image may be captured on film, for example.
  • the detector 22 may be configured to operate in full color (e.g., visible red, green, and blue light described above) or in monochrome.
  • the detector 22 may be an infrared image intensifier coupled with a CCD array responsive to infrared radiation.
  • a second embodiment of the optical sensor is shown in Fig. 8 and generally indicated at 80.
  • the second embodiment 80 is similar to the first embodiment 20 except that the holographic devices 26, 28, 30 of the first embodiment 20 formed their images on a common area of the detector 22 (Figs. 1-3), whereas the optical sensor 80 of the second embodiment forms images on different areas of the detector 22 (Fig. 8).
  • the images may be formed substantially simultaneously with one another by having controller 84 switch rapidly between holographic devices 90, 92, 94.
  • holographic device 90 is
  • the principles illustrated in the first and second embodiments 20, 80 may also be combined so that tiled images are formed on different areas of the detector 22 with one or more of the images being switchable between different fields of view.
  • the type and number of holographic devices 26, 28, 30, 90, 92, 94 may be different than shown and described herein without departing from the scope of the invention.
  • the system 20, 80 may include only two holographic devices.
  • the holographic devices may also be arranged to act upon ultra-violet or infrared radiation other than visible light. In this case, the detector 22 would be responsive to those particular wavelengths.
  • the detector 22 may be an infrared image intensifier coupled with a CCD array for an optical sensor responsive to infrared radiation.

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Holo Graphy (AREA)

Abstract

Cette invention concerne un système de détection d'images qui comprend au moins deux dispositifs optiques (90, 92) pouvant être commutés entre un état actif et un état passif dans lesquels la lumière est soit diffractée par le dispositif holographique, soit n'est pas diffractée. Ce système comprend en outre un détecteur (22) conçu pour détecter la lumière qui frappe sa surface. A l'état actif, le premier (90) des deux dispositifs optiques diffracte la lumière qui le traverse et forme sur le détecteur (22) une image d'un premier champ visuel (A1). De même, à l'état actif, le second (92) des deux dispositifs optiques diffracte la lumière qui le traverse et forme sur le détecteur (22) une image d'un second champ visuel (A2) qui est différent du premier champ visuel (A1).
PCT/US2000/001191 1999-01-29 2000-01-18 Detecteur optique Ceased WO2000045608A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU27300/00A AU2730000A (en) 1999-01-29 2000-01-18 Optical sensor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11782599P 1999-01-29 1999-01-29
US60/117,825 1999-01-29

Publications (1)

Publication Number Publication Date
WO2000045608A1 true WO2000045608A1 (fr) 2000-08-03

Family

ID=22375039

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/001191 Ceased WO2000045608A1 (fr) 1999-01-29 2000-01-18 Detecteur optique

Country Status (2)

Country Link
AU (1) AU2730000A (fr)
WO (1) WO2000045608A1 (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003045734A1 (fr) * 2001-11-21 2003-06-05 Robert Bosch Gmbh Dispositif de detection, notamment pour commander des dispositifs d'allumage d'un vehicule
EP1802102A1 (fr) * 2005-12-23 2007-06-27 DLR Deutsches Zentrum für Luft- und Raumfahrt e.V. Système optique et procédé destiné à l'enregistrement d'images avec différent agrandissements
CN100405542C (zh) * 2004-01-30 2008-07-23 惠普开发有限公司 半导体器件的形成方法和系统
US7888626B2 (en) 2005-05-23 2011-02-15 Qinetiq Limited Coded aperture imaging system having adjustable imaging performance with a reconfigurable coded aperture mask
US7923677B2 (en) 2006-02-06 2011-04-12 Qinetiq Limited Coded aperture imager comprising a coded diffractive mask
US7969639B2 (en) 2006-02-06 2011-06-28 Qinetiq Limited Optical modulator
US8017899B2 (en) 2006-02-06 2011-09-13 Qinetiq Limited Coded aperture imaging using successive imaging of a reference object at different positions
US8035085B2 (en) 2006-02-06 2011-10-11 Qinetiq Limited Coded aperture imaging system
US8068680B2 (en) 2006-02-06 2011-11-29 Qinetiq Limited Processing methods for coded aperture imaging
US8073268B2 (en) 2006-02-06 2011-12-06 Qinetiq Limited Method and apparatus for coded aperture imaging
US8229165B2 (en) 2006-07-28 2012-07-24 Qinetiq Limited Processing method for coded aperture sensor
US8431087B2 (en) 2006-09-25 2013-04-30 Covidien Lp Carbon dioxide detector having borosilicate substrate
EP1650596B1 (fr) * 2004-10-25 2014-03-26 Deutsches Zentrum für Luft- und Raumfahrt e.V. Système optique muni de caractéristique d'affichage modifiables et procédé destiné à l'ajustage de caractéristiques d'affichage modifiables
US20170195580A1 (en) * 2010-12-15 2017-07-06 SoliDDD Corp. Resolution For Autostereoscopic Video Displays
WO2017160367A1 (fr) * 2016-03-17 2017-09-21 Google Inc. Orientation de faisceau électro-optique pour imagerie à super-résolution / champ lumineux
WO2018112160A3 (fr) * 2016-12-18 2018-10-18 Soliddd Corp Résolution améliorée pour affichages vidéo auto-stéréoscopiques
US10295833B2 (en) 2010-12-15 2019-05-21 SoliDDD Corp. Resolution for autostereoscopic video displays

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4142204A (en) * 1977-11-09 1979-02-27 Rca Corporation Color image storage and display utilizing holography
US4807978A (en) * 1987-09-10 1989-02-28 Hughes Aircraft Company Color display device and method using holographic lenses
US5216247A (en) * 1992-02-07 1993-06-01 Ying Wang Optical scanning method with circular arc scanning traces
US5768242A (en) * 1996-04-05 1998-06-16 The United States Of America As Representd By The Administrator Of The National Aeronautics And Space Administration Apparatus and method for focusing a light beam in a three-dimensional recording medium by a dynamic holographic device
US5815222A (en) * 1994-03-18 1998-09-29 Fujitsu Limited Apparatus for deflecting light, device for scanning light, device for reading information and device for stereoscopic display

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4142204A (en) * 1977-11-09 1979-02-27 Rca Corporation Color image storage and display utilizing holography
US4807978A (en) * 1987-09-10 1989-02-28 Hughes Aircraft Company Color display device and method using holographic lenses
US5216247A (en) * 1992-02-07 1993-06-01 Ying Wang Optical scanning method with circular arc scanning traces
US5815222A (en) * 1994-03-18 1998-09-29 Fujitsu Limited Apparatus for deflecting light, device for scanning light, device for reading information and device for stereoscopic display
US5768242A (en) * 1996-04-05 1998-06-16 The United States Of America As Representd By The Administrator Of The National Aeronautics And Space Administration Apparatus and method for focusing a light beam in a three-dimensional recording medium by a dynamic holographic device

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7214918B2 (en) 2001-11-21 2007-05-08 Robert Bosch Gmbh Sensor device, particularly for controlling lighting devices of a motor vehicle
WO2003045734A1 (fr) * 2001-11-21 2003-06-05 Robert Bosch Gmbh Dispositif de detection, notamment pour commander des dispositifs d'allumage d'un vehicule
CN100405542C (zh) * 2004-01-30 2008-07-23 惠普开发有限公司 半导体器件的形成方法和系统
EP1650596B1 (fr) * 2004-10-25 2014-03-26 Deutsches Zentrum für Luft- und Raumfahrt e.V. Système optique muni de caractéristique d'affichage modifiables et procédé destiné à l'ajustage de caractéristiques d'affichage modifiables
US7888626B2 (en) 2005-05-23 2011-02-15 Qinetiq Limited Coded aperture imaging system having adjustable imaging performance with a reconfigurable coded aperture mask
EP1802102A1 (fr) * 2005-12-23 2007-06-27 DLR Deutsches Zentrum für Luft- und Raumfahrt e.V. Système optique et procédé destiné à l'enregistrement d'images avec différent agrandissements
US7969639B2 (en) 2006-02-06 2011-06-28 Qinetiq Limited Optical modulator
US8017899B2 (en) 2006-02-06 2011-09-13 Qinetiq Limited Coded aperture imaging using successive imaging of a reference object at different positions
US8035085B2 (en) 2006-02-06 2011-10-11 Qinetiq Limited Coded aperture imaging system
US8068680B2 (en) 2006-02-06 2011-11-29 Qinetiq Limited Processing methods for coded aperture imaging
US8073268B2 (en) 2006-02-06 2011-12-06 Qinetiq Limited Method and apparatus for coded aperture imaging
US7923677B2 (en) 2006-02-06 2011-04-12 Qinetiq Limited Coded aperture imager comprising a coded diffractive mask
US8229165B2 (en) 2006-07-28 2012-07-24 Qinetiq Limited Processing method for coded aperture sensor
US8431087B2 (en) 2006-09-25 2013-04-30 Covidien Lp Carbon dioxide detector having borosilicate substrate
US20170195580A1 (en) * 2010-12-15 2017-07-06 SoliDDD Corp. Resolution For Autostereoscopic Video Displays
US10295833B2 (en) 2010-12-15 2019-05-21 SoliDDD Corp. Resolution for autostereoscopic video displays
US10750101B2 (en) 2010-12-15 2020-08-18 SoliDDD Corp. Resolution for autostereoscopic video displays
WO2017160367A1 (fr) * 2016-03-17 2017-09-21 Google Inc. Orientation de faisceau électro-optique pour imagerie à super-résolution / champ lumineux
US9886742B2 (en) 2016-03-17 2018-02-06 Google Llc Electro-optic beam steering for super-resolution/lightfield imagery
WO2018112160A3 (fr) * 2016-12-18 2018-10-18 Soliddd Corp Résolution améliorée pour affichages vidéo auto-stéréoscopiques
CN110115023A (zh) * 2016-12-18 2019-08-09 真三维公司 全景摄像机
KR20190116250A (ko) * 2016-12-18 2019-10-14 솔리디디디 코포레이션 파노라마 카메라
CN110115023B (zh) * 2016-12-18 2021-11-16 真三维公司 全景摄像机
KR102512679B1 (ko) * 2016-12-18 2023-03-21 솔리디디디 코포레이션 파노라마 카메라

Also Published As

Publication number Publication date
AU2730000A (en) 2000-08-18

Similar Documents

Publication Publication Date Title
US6082862A (en) Image tiling technique based on electrically switchable holograms
WO2000045608A1 (fr) Detecteur optique
US6091521A (en) Light collection from diffractive displays
JP3184409B2 (ja) 三次元イメージング装置、カメラ、及び顕微鏡
TWI554783B (zh) A display device, in particular a head mounted display or goggles
US6124954A (en) Projection screen based on reconfigurable holographic optics for implementation in head-mounted displays
US6504629B1 (en) Method and apparatus for illuminating a display
WO2000026706A1 (fr) Affichage holographique a rapport de forme commutable
US11012635B2 (en) Optical device including pinhole array aperture and related methods
US20010024177A1 (en) Holographic display system
US20150234102A1 (en) Dynamically focusable multispectral light field imaging
GB2313920A (en) Diffractive spatial light modulator and display
TW201300834A (zh) 顯示裝置，尤其是頭戴式顯示器或護目鏡
US20090174918A1 (en) Electrically-controlled, variable focal length h-pdlc optical imaging apparatus and method
US20210247632A1 (en) Optical elements for integrated ir and visible camera for depth sensing and systems incorporating the same
WO2001009685A1 (fr) Systeme d'affichage avec poursuite oculaire
JP5638766B2 (ja) 光学センサー
WO1982004369A1 (fr) Dispositif de valve de lumiere
US7443440B2 (en) Color separator and imager
JPH09189892A (ja) 回折光学系およびこれに用いる液晶回折レンズ
WO2021244036A1 (fr) Réseau de diffraction, dispositif d'affichage 3d et procédé d'affichage 3d
JP4443046B2 (ja) 構成可変ホログラフィー光学系に基づく投影システム
JP2004170508A (ja) マイクロ構造体
WO2000057216A1 (fr) Procede et appareil pour eclairer un afficheur
WO2000072057A1 (fr) Systeme de concentration de lumiere

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH GM HR HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase