GB2163566B - Thermal imagers - Google Patents

Thermal imagers

Info

Publication number
GB2163566B
GB2163566B GB08520913A GB8520913A GB2163566B GB 2163566 B GB2163566 B GB 2163566B GB 08520913 A GB08520913 A GB 08520913A GB 8520913 A GB8520913 A GB 8520913A GB 2163566 B GB2163566 B GB 2163566B
Authority
GB
United Kingdom
Prior art keywords
thermal imagers
imagers
thermal
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
GB08520913A
Other versions
GB2163566A (en
GB8520913D0 (en
Inventor
Alan David Hart
Surinder Singh Makh
David Leslie Tunnicliffe
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.)
BAE Systems PLC
Original Assignee
British Aerospace PLC
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 British Aerospace PLC filed Critical British Aerospace PLC
Publication of GB8520913D0 publication Critical patent/GB8520913D0/en
Publication of GB2163566A publication Critical patent/GB2163566A/en
Priority to US07/168,557 priority Critical patent/US4917476A/en
Application granted granted Critical
Publication of GB2163566B publication Critical patent/GB2163566B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G02F1/132—Thermal activation of liquid crystals exhibiting a thermo-optic effect
    • 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
    • G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/139—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
    • G02F1/141—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent using ferroelectric liquid crystals
GB08520913A 1984-08-21 1985-08-21 Thermal imagers Expired GB2163566B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US07/168,557 US4917476A (en) 1985-06-21 1988-03-04 Thermal imagers using liquid crystal sensing elements

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8421187 1984-08-21
GB8515789 1985-06-21

Publications (3)

Publication Number Publication Date
GB8520913D0 GB8520913D0 (en) 1985-10-23
GB2163566A GB2163566A (en) 1986-02-26
GB2163566B true GB2163566B (en) 1988-04-07

Family

ID=26288141

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08520913A Expired GB2163566B (en) 1984-08-21 1985-08-21 Thermal imagers

Country Status (1)

Country Link
GB (1) GB2163566B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IE56194B1 (en) * 1985-01-07 1991-05-08 Scully Richard L Infrared imaging system
EP0206778B1 (en) * 1985-06-21 1993-05-05 British Aerospace Public Limited Company Thermal imagers
US4917476A (en) * 1985-06-21 1990-04-17 British Aerospace Public Limited Company Thermal imagers using liquid crystal sensing elements
US5691689A (en) * 1995-08-11 1997-11-25 Eaton Corporation Electrical circuit protection devices comprising PTC conductive liquid crystal polymer compositions

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3666948A (en) * 1971-01-06 1972-05-30 Xerox Corp Liquid crystal thermal imaging system having an undisturbed image on a disturbed background
GB1442802A (en) * 1973-02-19 1976-07-14 Post Office Temperature measurement using liquid crystals
GB2145875B (en) * 1983-08-12 1986-11-26 Standard Telephones Cables Ltd Infra-red-detector

Also Published As

Publication number Publication date
GB2163566A (en) 1986-02-26
GB8520913D0 (en) 1985-10-23

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Legal Events

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

Effective date: 19930821