GB1333945A - Variable light-filtering device - Google Patents

Variable light-filtering device

Info

Publication number
GB1333945A
GB1333945A GB4159070A GB1333945DA GB1333945A GB 1333945 A GB1333945 A GB 1333945A GB 4159070 A GB4159070 A GB 4159070A GB 1333945D A GB1333945D A GB 1333945DA GB 1333945 A GB1333945 A GB 1333945A
Authority
GB
United Kingdom
Prior art keywords
polymers
variable light
dipyridylium
dibromo
polymer
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
GB4159070A
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.)
Polaroid Corp
Original Assignee
Polaroid Corp
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 Polaroid Corp filed Critical Polaroid Corp
Publication of GB1333945A publication Critical patent/GB1333945A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K9/00—Tenebrescent materials, i.e. materials for which the range of wavelengths for energy absorption is changed as a result of excitation by some form of energy
    • C09K9/02—Organic tenebrescent materials
    • 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 
    • G02F1/15—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 an electrochromic effect
    • G02F1/1503—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 an electrochromic effect caused by oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

1333945 Dipyridylium polymers POLAROID CORP 28 Aug 1970 [2 Sept 1969] 41590/70 Heading C3R [Also in Divisions E1 F4 G1 G2 H4 and B7] Dipyridylium polymers have units of formula where R 3 is alkylene containing 4 to 8 carbon atoms or xylylene and A is an anion. Examples of polymers are those obtained by reacting 4,4<SP>1</SP>- dipyridyl with 1,8-dibromo-octane and with 2,2<SP>1</SP> - dibromo - p - xylene. The polymers are redox compounds which are capable of reversibly forming a stable coloured free radical upon the addition of electrons. A variable light filter may be formed from a layer of the polymer (which is light-transmitting) and electrodes to pass a current through the layer. If a cast film of the polymer is stroked in one direction, current flow will cause the film to become polarizing and coloured.
GB4159070A 1970-08-28 1970-08-28 Variable light-filtering device Expired GB1333945A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4159070 1970-08-28

Publications (1)

Publication Number Publication Date
GB1333945A true GB1333945A (en) 1973-10-17

Family

ID=10420398

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4159070A Expired GB1333945A (en) 1970-08-28 1970-08-28 Variable light-filtering device

Country Status (1)

Country Link
GB (1) GB1333945A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2402697A1 (en) * 1977-09-09 1979-04-06 Samokhin Andrei ELECTROLYTE FOR SOLID ELECTROCHROME INDICATOR BASED ON TRANSITION METAL OXIDES
GB2154268A (en) * 1984-02-06 1985-09-04 Howard Ivan Gardner Window blinds
GB2161853A (en) * 1984-07-11 1986-01-22 Adrian Atkinson Glazing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2402697A1 (en) * 1977-09-09 1979-04-06 Samokhin Andrei ELECTROLYTE FOR SOLID ELECTROCHROME INDICATOR BASED ON TRANSITION METAL OXIDES
GB2154268A (en) * 1984-02-06 1985-09-04 Howard Ivan Gardner Window blinds
GB2161853A (en) * 1984-07-11 1986-01-22 Adrian Atkinson Glazing

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee