GB1477175A - Retro-reflective transparent spheres or beads - Google Patents

Retro-reflective transparent spheres or beads

Info

Publication number
GB1477175A
GB1477175A GB2761074A GB2761074A GB1477175A GB 1477175 A GB1477175 A GB 1477175A GB 2761074 A GB2761074 A GB 2761074A GB 2761074 A GB2761074 A GB 2761074A GB 1477175 A GB1477175 A GB 1477175A
Authority
GB
United Kingdom
Prior art keywords
core
sphere
retro
beads
outer portion
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
GB2761074A
Other languages
English (en)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1477175A publication Critical patent/GB1477175A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors
    • G02B5/126—Reflex reflectors including curved refracting surface
    • G02B5/128—Reflex reflectors including curved refracting surface transparent spheres being embedded in matrix

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Surface Treatment Of Glass (AREA)
  • Joining Of Glass To Other Materials (AREA)
GB2761074A 1973-06-25 1974-06-21 Retro-reflective transparent spheres or beads Expired GB1477175A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2578473A IT989428B (it) 1973-06-25 1973-06-25 Perfezionamento agli elementi sferici catarifrangenti o retro collimanti per segnaletica stradale ed equivalenti impieghi e relativi elementi sferici retrocollimanti perfezionati

Publications (1)

Publication Number Publication Date
GB1477175A true GB1477175A (en) 1977-06-22

Family

ID=11217725

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2761074A Expired GB1477175A (en) 1973-06-25 1974-06-21 Retro-reflective transparent spheres or beads

Country Status (10)

Country Link
JP (1) JPS5050891A (it)
BE (1) BE816830A (it)
CA (1) CA1012807A (it)
CH (1) CH587495A5 (it)
DE (1) DE2430797A1 (it)
DK (1) DK340374A (it)
FR (1) FR2234574B1 (it)
GB (1) GB1477175A (it)
IT (1) IT989428B (it)
NL (1) NL7408573A (it)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005022210A1 (en) * 2003-08-29 2005-03-10 Bae Systems Plc Retroreflective device comprising gradient index lenses
WO2006052383A2 (en) * 2004-11-08 2006-05-18 Hewlett-Packard Development Company, L.P. Optically retro-reflecting sphere with a concentric outer shell
WO2009085550A1 (en) * 2007-12-21 2009-07-09 3M Innovative Properties Company Retroreflective pavement markings
EP2238486A1 (en) * 2007-12-21 2010-10-13 3M Innovative Properties Company Retroreflective articles and retroreflective elements comprising a spherical core and two concentric optical interference layers
US9645289B2 (en) 2013-09-27 2017-05-09 Rohm And Haas Company Optical effect coating
GB2545341A (en) * 2015-12-09 2017-06-14 Bae Systems Plc Improvements in and relating to remote sensing
US10852201B2 (en) 2015-12-09 2020-12-01 Bae Systems Plc Remote sensing
US10955345B2 (en) 2015-12-09 2021-03-23 Bae Systems Plc Relating to remote sensing

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3931022A1 (de) * 1989-09-16 1991-03-28 Hommelwerke Gmbh Optischer retroreflektor
NO301797B1 (no) * 1995-12-22 1997-12-08 Norsk Hydro As Retroreflekterende platemateriale og fremgangsmåte for fremstilling av slikt materiale

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005022210A1 (en) * 2003-08-29 2005-03-10 Bae Systems Plc Retroreflective device comprising gradient index lenses
US7170688B2 (en) 2003-08-29 2007-01-30 Bae Systems Plc Retroreflective device comprising gradient index lenses
WO2006052383A2 (en) * 2004-11-08 2006-05-18 Hewlett-Packard Development Company, L.P. Optically retro-reflecting sphere with a concentric outer shell
WO2006052383A3 (en) * 2004-11-08 2006-06-15 Hewlett Packard Development Co Optically retro-reflecting sphere with a concentric outer shell
US7224533B2 (en) 2004-11-08 2007-05-29 Hewlett-Packard Development Company, L.P. Optically retro-reflecting sphere
EP2238486A1 (en) * 2007-12-21 2010-10-13 3M Innovative Properties Company Retroreflective articles and retroreflective elements comprising a spherical core and two concentric optical interference layers
WO2009085550A1 (en) * 2007-12-21 2009-07-09 3M Innovative Properties Company Retroreflective pavement markings
US8496340B2 (en) 2007-12-21 2013-07-30 3M Innovative Properties Company Retroreflective articles and retroreflective elements comprising a spherical core and two concentric optical interference layers
CN101946043B (zh) * 2007-12-21 2013-08-07 3M创新有限公司 回射道路标记
US9645289B2 (en) 2013-09-27 2017-05-09 Rohm And Haas Company Optical effect coating
GB2545341A (en) * 2015-12-09 2017-06-14 Bae Systems Plc Improvements in and relating to remote sensing
GB2545341B (en) * 2015-12-09 2020-06-24 Bae Systems Plc Improvements in and relating to remote sensing
US10852201B2 (en) 2015-12-09 2020-12-01 Bae Systems Plc Remote sensing
US10955345B2 (en) 2015-12-09 2021-03-23 Bae Systems Plc Relating to remote sensing

Also Published As

Publication number Publication date
IT989428B (it) 1975-05-20
CA1012807A (en) 1977-06-28
FR2234574B1 (it) 1978-11-24
BE816830A (fr) 1974-10-16
JPS5050891A (it) 1975-05-07
DE2430797A1 (de) 1975-01-16
CH587495A5 (it) 1977-05-13
NL7408573A (it) 1974-12-30
FR2234574A1 (it) 1975-01-17
DK340374A (it) 1975-02-10

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Legal Events

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