GB1407409A - Detection of blemishes in a surface - Google Patents

Detection of blemishes in a surface

Info

Publication number
GB1407409A
GB1407409A GB4988571A GB4988571A GB1407409A GB 1407409 A GB1407409 A GB 1407409A GB 4988571 A GB4988571 A GB 4988571A GB 4988571 A GB4988571 A GB 4988571A GB 1407409 A GB1407409 A GB 1407409A
Authority
GB
United Kingdom
Prior art keywords
scanning
travelling
plane
cylindrical lens
negative
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
GB4988571A
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.)
Ferranti International PLC
Original Assignee
Ferranti PLC
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 Ferranti PLC filed Critical Ferranti PLC
Priority to GB4988571A priority Critical patent/GB1407409A/en
Priority to NO376672A priority patent/NO131850C/no
Priority to DE19722251915 priority patent/DE2251915A1/de
Priority to US00300568A priority patent/US3804534A/en
Priority to NL7214522A priority patent/NL7214522A/xx
Priority to FR7238172A priority patent/FR2159021A6/fr
Priority to JP10729972A priority patent/JPS4852284A/ja
Publication of GB1407409A publication Critical patent/GB1407409A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • 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
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • G01N21/8901—Optical details; Scanning details

Landscapes

  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Lenses (AREA)
GB4988571A 1971-10-27 1971-10-27 Detection of blemishes in a surface Expired GB1407409A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB4988571A GB1407409A (en) 1971-10-27 1971-10-27 Detection of blemishes in a surface
NO376672A NO131850C (enrdf_load_stackoverflow) 1971-10-27 1972-10-19
DE19722251915 DE2251915A1 (de) 1971-10-27 1972-10-23 Vorrichtung zum feststellen von flekken oder fehlern in einer oberflaeche
US00300568A US3804534A (en) 1971-10-27 1972-10-25 Detection of blemishes in a surface
NL7214522A NL7214522A (enrdf_load_stackoverflow) 1971-10-27 1972-10-26
FR7238172A FR2159021A6 (enrdf_load_stackoverflow) 1971-10-27 1972-10-27
JP10729972A JPS4852284A (enrdf_load_stackoverflow) 1971-10-27 1972-10-27

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4988571A GB1407409A (en) 1971-10-27 1971-10-27 Detection of blemishes in a surface

Publications (1)

Publication Number Publication Date
GB1407409A true GB1407409A (en) 1975-09-24

Family

ID=10453892

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4988571A Expired GB1407409A (en) 1971-10-27 1971-10-27 Detection of blemishes in a surface

Country Status (6)

Country Link
JP (1) JPS4852284A (enrdf_load_stackoverflow)
DE (1) DE2251915A1 (enrdf_load_stackoverflow)
FR (1) FR2159021A6 (enrdf_load_stackoverflow)
GB (1) GB1407409A (enrdf_load_stackoverflow)
NL (1) NL7214522A (enrdf_load_stackoverflow)
NO (1) NO131850C (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2307550A (en) * 1995-11-23 1997-05-28 British Aerospace Illumination of a test sample by scanning a line of coherent radiation
GB2429764A (en) * 2005-08-30 2007-03-07 Imp College Innovations Ltd A scanning device using a first optical system with a first focal length and a second optical system with a second focal length
WO2011005110A1 (en) * 2009-07-08 2011-01-13 Norsk Hydro Asa Method and apparatus for inspection of surfaces

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2263509B1 (enrdf_load_stackoverflow) * 1974-03-09 1981-04-10 Feldmuehle Anlagen Prod
DE2816986C3 (de) * 1978-04-19 1986-03-27 Agfa-Gevaert Ag, 5090 Leverkusen Anordnung zum Aufsuchen von Fehlern auf laufenden Bändern

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2307550A (en) * 1995-11-23 1997-05-28 British Aerospace Illumination of a test sample by scanning a line of coherent radiation
GB2429764A (en) * 2005-08-30 2007-03-07 Imp College Innovations Ltd A scanning device using a first optical system with a first focal length and a second optical system with a second focal length
WO2011005110A1 (en) * 2009-07-08 2011-01-13 Norsk Hydro Asa Method and apparatus for inspection of surfaces

Also Published As

Publication number Publication date
NL7214522A (enrdf_load_stackoverflow) 1973-05-02
NO131850C (enrdf_load_stackoverflow) 1975-08-13
FR2159021A6 (enrdf_load_stackoverflow) 1973-06-15
DE2251915A1 (de) 1973-05-03
JPS4852284A (enrdf_load_stackoverflow) 1973-07-23
NO131850B (enrdf_load_stackoverflow) 1975-05-05

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed