CA1012807A - Retroreflective transparent spheres or beads - Google Patents

Retroreflective transparent spheres or beads

Info

Publication number
CA1012807A
CA1012807A CA203,367A CA203367A CA1012807A CA 1012807 A CA1012807 A CA 1012807A CA 203367 A CA203367 A CA 203367A CA 1012807 A CA1012807 A CA 1012807A
Authority
CA
Canada
Prior art keywords
beads
transparent spheres
retroreflective
retroreflective transparent
spheres
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
CA203,367A
Other languages
English (en)
Other versions
CA203367S (en
Inventor
Ludwig Eigenmann
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
Application granted granted Critical
Publication of CA1012807A publication Critical patent/CA1012807A/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)
CA203,367A 1973-06-25 1974-06-25 Retroreflective transparent spheres or beads Expired CA1012807A (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
CA1012807A true CA1012807A (en) 1977-06-28

Family

ID=11217725

Family Applications (1)

Application Number Title Priority Date Filing Date
CA203,367A Expired CA1012807A (en) 1973-06-25 1974-06-25 Retroreflective 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)

Families Citing this family (10)

* 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
EP1660919B1 (en) 2003-08-29 2007-09-12 BAE Systems PLC Retroreflective device comprising gradient index lenses
US7224533B2 (en) 2004-11-08 2007-05-29 Hewlett-Packard Development Company, L.P. Optically retro-reflecting sphere
KR20100112585A (ko) * 2007-12-21 2010-10-19 쓰리엠 이노베이티브 프로퍼티즈 컴파니 재귀반사성 도로 마킹
WO2009082644A1 (en) 2007-12-21 2009-07-02 3M Innovative Properties Company Retroreflective articles and retroreflective elements comprising a spherical core and two concentric optical interference layers
TWI562891B (en) 2013-09-27 2016-12-21 Rohm & Haas Optical effect coating
WO2017098223A1 (en) 2015-12-09 2017-06-15 Bae Systems Plc Improvements in and relating to remote sensing
GB201521693D0 (en) * 2015-12-09 2016-01-20 Bae Systems Plc Improvements in and relating to remote sensing
WO2017098222A1 (en) 2015-12-09 2017-06-15 Bae Systems Plc Improvements in and relating to remote sensing

Also Published As

Publication number Publication date
IT989428B (it) 1975-05-20
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
GB1477175A (en) 1977-06-22

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