UST987003I4 - Retroluminometer - Google Patents

Retroluminometer Download PDF

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Publication number
UST987003I4
UST987003I4 US05/929,299 US92929978A UST987003I4 US T987003 I4 UST987003 I4 US T987003I4 US 92929978 A US92929978 A US 92929978A US T987003 I4 UST987003 I4 US T987003I4
Authority
US
United States
Prior art keywords
light
sign
marking
alternating
retroluminometer
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.)
Pending
Application number
US05/929,299
Inventor
Norbert L. Johnson
Michael J. Knowd
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Priority to US05/929,299 priority Critical patent/UST987003I4/en
Application granted granted Critical
Publication of UST987003I4 publication Critical patent/UST987003I4/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/55—Specular reflectivity

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

a retroluminometer for measuring retroreflectivity of signs or markings at their actual point of use comprises (1) a source of alternating light; (2) optical means for both directing the alternating light onto a sign or marking that is to be tested and for transmitting light retroreflected by the sign or marking onto a panel within the retroluminometer; (3) a matrix of light-transmitting means arranged on the face of the panel; (4) photosensing means optically connected to the light-transmitting means and adjustable to sense and measure the light from different ones of the light-transmitting means, thereby measuring retroreflection at different angles of deviation from the axis of the light beam incident on the sign or marking; and (5) electric circuitry for presenting the photosensed light as a visually-readable measurement. The electric circuitry includes filtering circuitry for filtering out signals having a frequency different from that of the alternating source so as to eliminate the effect of ambient or extraneous light.
US05/929,299 1978-07-31 1978-07-31 Retroluminometer Pending UST987003I4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US05/929,299 UST987003I4 (en) 1978-07-31 1978-07-31 Retroluminometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/929,299 UST987003I4 (en) 1978-07-31 1978-07-31 Retroluminometer

Publications (1)

Publication Number Publication Date
UST987003I4 true UST987003I4 (en) 1979-10-02

Family

ID=25457627

Family Applications (1)

Application Number Title Priority Date Filing Date
US05/929,299 Pending UST987003I4 (en) 1978-07-31 1978-07-31 Retroluminometer

Country Status (1)

Country Link
US (1) UST987003I4 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4505590A (en) 1982-08-30 1985-03-19 Amerace Corporation Mobile testing apparatus
US4703999A (en) 1986-06-16 1987-11-03 Minnesota Mining And Manufacturing Company Wide-angle-reflective cube-corner retroreflective sheeting
US5128804A (en) * 1991-02-06 1992-07-07 Minnesota Mining And Manufacturing Company Permeable retroreflective sheeting
US5200262A (en) * 1992-04-01 1993-04-06 Minnesota Mining And Manufacturing Company Launderable retroreflective applique with improved retention of retroreflective elements
US5200851A (en) * 1992-02-13 1993-04-06 Minnesota Mining And Manufacturing Company Infrared reflecting cube-cornered sheeting
US5207852A (en) * 1991-02-06 1993-05-04 Minnesota Mining And Manufacturing Company Method for making permeable retroreflective sheeting
US5254390A (en) * 1990-11-15 1993-10-19 Minnesota Mining And Manufacturing Company Plano-convex base sheet for retroreflective articles and method for making same
US5338595A (en) * 1991-05-08 1994-08-16 Minnesota Mining And Manufacturing Company Launderable retroreflective applique with metal-azo dye
WO2005047604A1 (en) 2003-11-06 2005-05-26 3M Innovative Properties Company Retroreflective elements comprising a bonded resin core and pavement markings
EP2082995A1 (en) 1999-10-27 2009-07-29 3M Innovative Properties Company Fluorochemical surfactants containing nonafluorobutanesulfonamide segments
US20100232019A1 (en) * 2003-03-06 2010-09-16 3M Innovative Properties Company Lamina comprising cube corner elements and retroreflective sheeting
WO2013130324A1 (en) 2012-02-28 2013-09-06 3M Innovative Properties Company Sheeting article with release coating comprising polyorganosiloxane and hydrophilic component
US10239277B2 (en) 2014-02-13 2019-03-26 3M Innovative Properties Company Flexible microsphere articles having high temperature stability
US10844160B2 (en) 2015-02-13 2020-11-24 3M Innovative Properties Company Flexible microsphere articles having high temperature stability

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4505590A (en) 1982-08-30 1985-03-19 Amerace Corporation Mobile testing apparatus
US4703999A (en) 1986-06-16 1987-11-03 Minnesota Mining And Manufacturing Company Wide-angle-reflective cube-corner retroreflective sheeting
US5254390A (en) * 1990-11-15 1993-10-19 Minnesota Mining And Manufacturing Company Plano-convex base sheet for retroreflective articles and method for making same
US5468540A (en) * 1990-11-15 1995-11-21 Minnesota Mining And Manufacturing Company Retroreflective article comprising a transparent base sheet and nacreous pigment coating, method for making such a base sheet, and method for making a forming master
US5670096A (en) * 1990-11-15 1997-09-23 Minnesota Mining And Manufacturing Company Retroreflective article comprising a transparent base sheet and nacreous pigment coating, method for making such a base sheet, and method for making a forming master
US5128804A (en) * 1991-02-06 1992-07-07 Minnesota Mining And Manufacturing Company Permeable retroreflective sheeting
US5207852A (en) * 1991-02-06 1993-05-04 Minnesota Mining And Manufacturing Company Method for making permeable retroreflective sheeting
US5338595A (en) * 1991-05-08 1994-08-16 Minnesota Mining And Manufacturing Company Launderable retroreflective applique with metal-azo dye
US5200851A (en) * 1992-02-13 1993-04-06 Minnesota Mining And Manufacturing Company Infrared reflecting cube-cornered sheeting
US5200262A (en) * 1992-04-01 1993-04-06 Minnesota Mining And Manufacturing Company Launderable retroreflective applique with improved retention of retroreflective elements
EP2082995A1 (en) 1999-10-27 2009-07-29 3M Innovative Properties Company Fluorochemical surfactants containing nonafluorobutanesulfonamide segments
US8251525B2 (en) 2003-03-06 2012-08-28 3M Innovative Properties Company Retroreflective sheeting including cube corner elements
US8714757B1 (en) 2003-03-06 2014-05-06 3M Innovative Properties Company Retroreflective sheeting including cube corner elements
US8016435B2 (en) 2003-03-06 2011-09-13 3M Innovative Properties Company Lamina comprising cube corner elements and retroreflective sheeting
US10884166B2 (en) 2003-03-06 2021-01-05 3M Innovative Properties Company Retroreflective sheeting including cube corner elements
US8262237B2 (en) 2003-03-06 2012-09-11 3M Innovative Properties Company Retroreflective sheeting including cube corner elements
US8419197B2 (en) 2003-03-06 2013-04-16 3M Innovative Properties Company Retroreflective sheeting including cube corner elements
US10495792B2 (en) 2003-03-06 2019-12-03 3M Innovative Properties Company Retroreflective sheeting including cube corner elements
US8573789B2 (en) 2003-03-06 2013-11-05 3M Innovative Properties Company Retroreflective sheeting including cube corner elements
US8708504B2 (en) 2003-03-06 2014-04-29 3M Innovative Properties Company Retroreflective sheeting including cube corner elements
US20100232019A1 (en) * 2003-03-06 2010-09-16 3M Innovative Properties Company Lamina comprising cube corner elements and retroreflective sheeting
US8851686B2 (en) 2003-03-06 2014-10-07 3M Innovative Properties Company Retroreflective sheeting including cube corner elements
US8998428B2 (en) 2003-03-06 2015-04-07 3M Innovative Properties Company Retroreflective sheeting including cube corner elements
US9188715B2 (en) 2003-03-06 2015-11-17 3M Innovative Properties Company Retroreflective sheeting including cube corner elements
US9470822B2 (en) 2003-03-06 2016-10-18 3M Innovative Properties Company Retroreflective sheeting including cube corner elements
US10101509B2 (en) 2003-03-06 2018-10-16 3M Innovative Properties Company Retroreflective sheeting including cube corner elements
WO2005047604A1 (en) 2003-11-06 2005-05-26 3M Innovative Properties Company Retroreflective elements comprising a bonded resin core and pavement markings
WO2013130324A1 (en) 2012-02-28 2013-09-06 3M Innovative Properties Company Sheeting article with release coating comprising polyorganosiloxane and hydrophilic component
US10239277B2 (en) 2014-02-13 2019-03-26 3M Innovative Properties Company Flexible microsphere articles having high temperature stability
US10844160B2 (en) 2015-02-13 2020-11-24 3M Innovative Properties Company Flexible microsphere articles having high temperature stability

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