IT989428B - IMPROVEMENT OF REFLECTIVE OR RETRO COLLIMATING SPHERICAL ELEMENTS FOR ROAD SIGNS AND EQUIVALENT USES AND RELATED IMPROVED SPHERICAL RETROCOLLIMANT ELEMENTS - Google Patents

IMPROVEMENT OF REFLECTIVE OR RETRO COLLIMATING SPHERICAL ELEMENTS FOR ROAD SIGNS AND EQUIVALENT USES AND RELATED IMPROVED SPHERICAL RETROCOLLIMANT ELEMENTS

Info

Publication number
IT989428B
IT989428B IT2578473A IT2578473A IT989428B IT 989428 B IT989428 B IT 989428B IT 2578473 A IT2578473 A IT 2578473A IT 2578473 A IT2578473 A IT 2578473A IT 989428 B IT989428 B IT 989428B
Authority
IT
Italy
Prior art keywords
elements
spherical
retrocollimant
retro
reflective
Prior art date
Application number
IT2578473A
Other languages
Italian (it)
Original Assignee
Eigenmann Ludwig
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 Eigenmann Ludwig filed Critical Eigenmann Ludwig
Priority to IT2578473A priority Critical patent/IT989428B/en
Priority to CH846674A priority patent/CH587495A5/xx
Priority to GB2761074A priority patent/GB1477175A/en
Priority to FR7422913A priority patent/FR2234574B1/fr
Priority to DE19742430797 priority patent/DE2430797A1/en
Priority to JP7146074A priority patent/JPS5050891A/ja
Priority to NL7408573A priority patent/NL7408573A/xx
Priority to BE145858A priority patent/BE816830A/en
Priority to DK340374A priority patent/DK340374A/da
Priority to CA203,367A priority patent/CA1012807A/en
Application granted granted Critical
Publication of IT989428B publication Critical patent/IT989428B/en

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
IT2578473A 1973-06-25 1973-06-25 IMPROVEMENT OF REFLECTIVE OR RETRO COLLIMATING SPHERICAL ELEMENTS FOR ROAD SIGNS AND EQUIVALENT USES AND RELATED IMPROVED SPHERICAL RETROCOLLIMANT ELEMENTS IT989428B (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
IT2578473A IT989428B (en) 1973-06-25 1973-06-25 IMPROVEMENT OF REFLECTIVE OR RETRO COLLIMATING SPHERICAL ELEMENTS FOR ROAD SIGNS AND EQUIVALENT USES AND RELATED IMPROVED SPHERICAL RETROCOLLIMANT ELEMENTS
CH846674A CH587495A5 (en) 1973-06-25 1974-06-20
GB2761074A GB1477175A (en) 1973-06-25 1974-06-21 Retro-reflective transparent spheres or beads
DE19742430797 DE2430797A1 (en) 1973-06-25 1974-06-24 SPHERICAL REFLECTIVE OR COLLIMATIONAL ELEMENT FOR ROAD MARKING AND SIMILAR USES
FR7422913A FR2234574B1 (en) 1973-06-25 1974-06-24
JP7146074A JPS5050891A (en) 1973-06-25 1974-06-24
NL7408573A NL7408573A (en) 1973-06-25 1974-06-25
BE145858A BE816830A (en) 1973-06-25 1974-06-25 REFLECTIVE SPHERICAL ELEMENT OR COLLIMATOR FOR ROAD SIGNALING AND EQUIVALENT USES
DK340374A DK340374A (en) 1973-06-25 1974-06-25
CA203,367A CA1012807A (en) 1973-06-25 1974-06-25 Retroreflective transparent spheres or beads

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2578473A IT989428B (en) 1973-06-25 1973-06-25 IMPROVEMENT OF REFLECTIVE OR RETRO COLLIMATING SPHERICAL ELEMENTS FOR ROAD SIGNS AND EQUIVALENT USES AND RELATED IMPROVED SPHERICAL RETROCOLLIMANT ELEMENTS

Publications (1)

Publication Number Publication Date
IT989428B true IT989428B (en) 1975-05-20

Family

ID=11217725

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2578473A IT989428B (en) 1973-06-25 1973-06-25 IMPROVEMENT OF REFLECTIVE OR RETRO COLLIMATING SPHERICAL ELEMENTS FOR ROAD SIGNS AND EQUIVALENT USES AND RELATED IMPROVED SPHERICAL RETROCOLLIMANT ELEMENTS

Country Status (10)

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

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3931022A1 (en) * 1989-09-16 1991-03-28 Hommelwerke Gmbh OPTICAL RETROR REFLECTOR
NO301797B1 (en) * 1995-12-22 1997-12-08 Norsk Hydro As Retroreflective plate material and method for making such material
ATE373248T1 (en) * 2003-08-29 2007-09-15 Bae Systems Plc RETROREFLECTIVE DEVICE WITH GRADIENT INDEX LENSES
US7224533B2 (en) 2004-11-08 2007-05-29 Hewlett-Packard Development Company, L.P. Optically retro-reflecting sphere
JP5330407B2 (en) * 2007-12-21 2013-10-30 スリーエム イノベイティブ プロパティズ カンパニー Retroreflective pavement marking
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
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
WO2017098222A1 (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

Also Published As

Publication number Publication date
NL7408573A (en) 1974-12-30
CH587495A5 (en) 1977-05-13
FR2234574B1 (en) 1978-11-24
JPS5050891A (en) 1975-05-07
BE816830A (en) 1974-10-16
FR2234574A1 (en) 1975-01-17
CA1012807A (en) 1977-06-28
GB1477175A (en) 1977-06-22
DK340374A (en) 1975-02-10
DE2430797A1 (en) 1975-01-16

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