FR2404216A1 - Instrument permettant de determiner la nettete d'image d'une couche de peinture - Google Patents

Instrument permettant de determiner la nettete d'image d'une couche de peinture

Info

Publication number
FR2404216A1
FR2404216A1 FR7827537A FR7827537A FR2404216A1 FR 2404216 A1 FR2404216 A1 FR 2404216A1 FR 7827537 A FR7827537 A FR 7827537A FR 7827537 A FR7827537 A FR 7827537A FR 2404216 A1 FR2404216 A1 FR 2404216A1
Authority
FR
France
Prior art keywords
image sharpness
instrument
sharpness
sample
opening
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.)
Granted
Application number
FR7827537A
Other languages
English (en)
Other versions
FR2404216B1 (fr
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and 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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of FR2404216A1 publication Critical patent/FR2404216A1/fr
Application granted granted Critical
Publication of FR2404216B1 publication Critical patent/FR2404216B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

L'invention concerne un instrument portatif permettant de mesurer la netteté d'image d'une couche de peinture par comparaison avec plusieurs couches normalisées dont la netteté d'image est connue. Par une fenêtre 4 ménagée dans un boîtier 5, l'instrument laisse voir l'échantillon à mesurer (ouverture 9) et un étalon normalisé (ouverture 10), tandis qu'un dessin porté par l'ensemble 8 est simultanément projeté sur les deux ouvertures par une source lumineuse 7. Pour déterminer la netteté d'image de l'échantillon, l'observateur fait tourner un disque 2 portant une gamme d'échantillons jusqu'à obtenir des effets égaux. L'invention permet de remplacer une mesure absolue qui dépend de l'acuité visuelle de l'observateur par une mesure relative. Elle s'applique notamment à la vérification des couches de finition des carrosseries d'automobiles.
FR7827537A 1977-09-26 1978-09-26 Instrument permettant de determiner la nettete d'image d'une couche de peinture Granted FR2404216A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US83684177A 1977-09-26 1977-09-26

Publications (2)

Publication Number Publication Date
FR2404216A1 true FR2404216A1 (fr) 1979-04-20
FR2404216B1 FR2404216B1 (fr) 1983-11-25

Family

ID=25272864

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7827537A Granted FR2404216A1 (fr) 1977-09-26 1978-09-26 Instrument permettant de determiner la nettete d'image d'une couche de peinture

Country Status (7)

Country Link
JP (1) JPS5930212B2 (fr)
BE (1) BE870731A (fr)
CA (1) CA1110873A (fr)
DE (1) DE2841912A1 (fr)
FR (1) FR2404216A1 (fr)
GB (1) GB2005435B (fr)
IT (1) IT1099195B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0657219B2 (ja) * 1985-04-23 1994-08-03 オリンパス光学工業株式会社 内視鏡用鉗子装置
JPS632020Y2 (fr) * 1985-05-29 1988-01-19

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE535296C (de) * 1930-05-03 1931-10-08 Schmidt & Haensch Franz Vorrichtung zum Bestimmen des Glanzes von Flaechen beliebiger Art
DE1126156B (de) * 1958-02-03 1962-03-22 Wiederhold Fa Hermann Verfahren und Vorrichtung zum Messen des Spiegelglanzes von Oberflaechen, insbesondere von Anstrichen
AT296641B (de) * 1967-10-11 1972-02-25 Mini Ind Constructillor Verfahren zur Bestimmung der Oberflächenbeschaffenheit eines Prüflings und Vorrichtung zur Durchführung des Verfahrens
FR2258617A1 (en) * 1974-01-17 1975-08-18 Peugeot & Renault Motor vehicle paintwork inspection process - uses observation of reflected grid lines on photographic film

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1831420U (de) * 1959-06-08 1961-05-18 Michael Huber Farbenfabrik Vorrichtung zur pruefung und bestimmung des glanzes bedruckter und unbedruckter drucktraeger.
DE1913113U (de) * 1964-12-02 1965-04-01 Fritz Hellige & Co G M B H Fab Geraet fuer visuelle kolorimetrie.
DE2230277A1 (de) * 1972-06-21 1974-01-10 Basf Farben & Fasern Vorrichtung und verfahren zur quantitativen beurteilung der oberflaechenbeschaffenheit
DE7622239U1 (de) * 1976-07-14 1976-12-23 Tintometer Gmbh, 4600 Dortmund Farbkomparator
JPH0734457Y2 (ja) * 1993-06-14 1995-08-02 久夫 中須 ポール

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE535296C (de) * 1930-05-03 1931-10-08 Schmidt & Haensch Franz Vorrichtung zum Bestimmen des Glanzes von Flaechen beliebiger Art
DE1126156B (de) * 1958-02-03 1962-03-22 Wiederhold Fa Hermann Verfahren und Vorrichtung zum Messen des Spiegelglanzes von Oberflaechen, insbesondere von Anstrichen
AT296641B (de) * 1967-10-11 1972-02-25 Mini Ind Constructillor Verfahren zur Bestimmung der Oberflächenbeschaffenheit eines Prüflings und Vorrichtung zur Durchführung des Verfahrens
FR2258617A1 (en) * 1974-01-17 1975-08-18 Peugeot & Renault Motor vehicle paintwork inspection process - uses observation of reflected grid lines on photographic film

Also Published As

Publication number Publication date
IT7828112A0 (it) 1978-09-26
CA1110873A (fr) 1981-10-20
JPS5463881A (en) 1979-05-23
IT1099195B (it) 1985-09-18
FR2404216B1 (fr) 1983-11-25
GB2005435A (en) 1979-04-19
BE870731A (fr) 1979-03-26
GB2005435B (en) 1982-01-20
DE2841912A1 (de) 1979-04-12
JPS5930212B2 (ja) 1984-07-25

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Legal Events

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