GB1509823A - Liquid crystal imaging of radiograms - Google Patents

Liquid crystal imaging of radiograms

Info

Publication number
GB1509823A
GB1509823A GB602076A GB602076A GB1509823A GB 1509823 A GB1509823 A GB 1509823A GB 602076 A GB602076 A GB 602076A GB 602076 A GB602076 A GB 602076A GB 1509823 A GB1509823 A GB 1509823A
Authority
GB
United Kingdom
Prior art keywords
liquid crystal
crystal material
matrix
glass plate
chamber
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.)
Expired
Application number
GB602076A
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.)
Xonics Inc
Original Assignee
Xonics 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 Xonics Inc filed Critical Xonics Inc
Priority to GB602076A priority Critical patent/GB1509823A/en
Priority to BE1007205A priority patent/BE838600A/en
Priority to FR7604227A priority patent/FR2341172A1/en
Priority to DE19762606543 priority patent/DE2606543A1/en
Publication of GB1509823A publication Critical patent/GB1509823A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/29—Measurement performed on radiation beams, e.g. position or section of the beam; Measurement of spatial distribution of radiation
    • G01T1/2914—Measurement of spatial distribution of radiation
    • G01T1/2921—Static instruments for imaging the distribution of radioactivity in one or two dimensions; Radio-isotope cameras
    • 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
    • G02F1/1313—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 specially adapted for a particular application
    • 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
    • G02F1/135—Liquid crystal cells structurally associated with a photoconducting or a ferro-electric layer, the properties of which can be optically or electrically varied
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/054—Apparatus for electrographic processes using a charge pattern using X-rays, e.g. electroradiography
    • G03G15/0545—Ionography, i.e. X-rays induced liquid or gas discharge

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Mathematical Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Molecular Biology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Pathology (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Liquid Crystal (AREA)

Abstract

1509823 Controlling light XONICS Inc 16 Feb 1976 06020/76 Heading G2F [Also in Division H1] A device which provides an optical output corresponding to an incident x-ray image includes a chamber 17 having an upper wall electrode 15 and filled with an x-ray absorbing, electrically insulating, liquid having atoms of an atomic number of at least 17, the charge image resulting from ionization of the liquid being transferred through a matrix of pins 16 in a glass plate which forms the lower wall of the chamber, to modulate a liquid crystal 20 contained between the glass plate and a transparent electrode 19. The liquid crystal material may be of either dynamic scattering or of field effect type. In the former case, the polarity of the potential difference across the chamber 17 is preferably reversed between successive exposures, giving alternate electron and positive ion images at the matrix, in order to increase the useful life of the liquid crystal. To improve the optical image, in the former case the lower ends of the metal pins 16 may be polished to enhance their reflectivity, and in the latter case the insulating layer which it is necessary to interpose between the pin matrix and the liquid crystal material may be in the form of a dielectric mirror; a lamp 34 may also be directed at the window. Reference is made to the use of a storage liquid crystal material, to permit preservation of an image until erased by the application of A.C. The pin matrix glass plate may be x-ray absorbing, to constitute an x-ray shield for the liquid crystal material.
GB602076A 1976-02-16 1976-02-16 Liquid crystal imaging of radiograms Expired GB1509823A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB602076A GB1509823A (en) 1976-02-16 1976-02-16 Liquid crystal imaging of radiograms
BE1007205A BE838600A (en) 1976-02-16 1976-02-16 DISPLAY OF RADIOGRAMS USING LIQUID CRYSTALS
FR7604227A FR2341172A1 (en) 1976-02-16 1976-02-16 DISPLAY OF RADIOGRAMS USING LIQUID CRYSTALS
DE19762606543 DE2606543A1 (en) 1976-02-16 1976-02-16 LIQUID CRYSTAL IMAGE FORMATION FROM RADIOGRAMS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB602076A GB1509823A (en) 1976-02-16 1976-02-16 Liquid crystal imaging of radiograms

Publications (1)

Publication Number Publication Date
GB1509823A true GB1509823A (en) 1978-05-04

Family

ID=9806980

Family Applications (1)

Application Number Title Priority Date Filing Date
GB602076A Expired GB1509823A (en) 1976-02-16 1976-02-16 Liquid crystal imaging of radiograms

Country Status (4)

Country Link
BE (1) BE838600A (en)
DE (1) DE2606543A1 (en)
FR (1) FR2341172A1 (en)
GB (1) GB1509823A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4794296A (en) * 1986-03-18 1988-12-27 Optron System, Inc. Charge transfer signal processor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4794296A (en) * 1986-03-18 1988-12-27 Optron System, Inc. Charge transfer signal processor

Also Published As

Publication number Publication date
FR2341172B1 (en) 1979-08-31
DE2606543A1 (en) 1977-08-18
BE838600A (en) 1976-06-16
FR2341172A1 (en) 1977-09-09

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee