GB1376135A - Detection of blemishes in surfaces - Google Patents

Detection of blemishes in surfaces

Info

Publication number
GB1376135A
GB1376135A GB552871A GB552871A GB1376135A GB 1376135 A GB1376135 A GB 1376135A GB 552871 A GB552871 A GB 552871A GB 552871 A GB552871 A GB 552871A GB 1376135 A GB1376135 A GB 1376135A
Authority
GB
United Kingdom
Prior art keywords
lens
feb
convex
elongated cylindrical
reflecting surfaces
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
GB552871A
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 GB552871A priority Critical patent/GB1376135A/en
Priority to DE19722206126 priority patent/DE2206126A1/en
Priority to IT4825672A priority patent/IT948549B/en
Priority to CA134,494A priority patent/CA958792A/en
Priority to FR7205900A priority patent/FR2127699A5/fr
Publication of GB1376135A publication Critical patent/GB1376135A/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
    • G01N21/8901—Optical details; Scanning details

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • 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)
  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

1376135 Scanning a web FERRANTI Ltd 18 Feb 1972 [26 Feb 1971] 5528/71 Heading G1A In a scanning station for detecting blemishes in a surface 11, a beam from a laser 1 is made to scan the surface by a lens system 8, a positionally adjustable right angled mirrored prism 7 and elongated cylindrical lens 16. The intensity of the light that has been reflected off the surface is measured by a photo-multiplier 2 with the aid of a plane mirror 6 and the reflective surfaces on the inside of the station. The reflective inside walls may take several forms, that is, parallel opposed reflecting surfaces Fig.9 (not shown), or parallel opposed reflecting surfaces whose ends near the moving surface are made to taper inwardly slightly or curve inwards slightly. The elongated cylindrical lens may be plano-convex, bi-convex, or circular in cross-section and the effect of dust or marks on the lens may be eliminated by utilizing electric circuitry incorporating memories. In a second embodiment, Fig.1 (not shown), lens 16 is omitted.
GB552871A 1971-02-26 1971-02-26 Detection of blemishes in surfaces Expired GB1376135A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB552871A GB1376135A (en) 1971-02-26 1971-02-26 Detection of blemishes in surfaces
DE19722206126 DE2206126A1 (en) 1971-02-26 1972-02-09 Device for detecting defects in a surface
IT4825672A IT948549B (en) 1971-02-26 1972-02-10 DEVICE FOR THE DETECTION OF SURFACE DEFECTS
CA134,494A CA958792A (en) 1971-02-26 1972-02-11 Detection of blemishes on surfaces
FR7205900A FR2127699A5 (en) 1971-02-26 1972-02-22

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB552871A GB1376135A (en) 1971-02-26 1971-02-26 Detection of blemishes in surfaces

Publications (1)

Publication Number Publication Date
GB1376135A true GB1376135A (en) 1974-12-04

Family

ID=9797904

Family Applications (1)

Application Number Title Priority Date Filing Date
GB552871A Expired GB1376135A (en) 1971-02-26 1971-02-26 Detection of blemishes in surfaces

Country Status (5)

Country Link
CA (1) CA958792A (en)
DE (1) DE2206126A1 (en)
FR (1) FR2127699A5 (en)
GB (1) GB1376135A (en)
IT (1) IT948549B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4207001A (en) * 1976-05-24 1980-06-10 The University Of Queensland Particle size analyzer
CN107345918A (en) * 2017-08-16 2017-11-14 广西大学 A kind of board quality testing apparatus and method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1436124A (en) * 1972-07-29 1976-05-19 Ferranti Ltd Detection of blemishes in surfaces
SE7502440L (en) * 1974-03-09 1975-09-10 Feldmuehle Anlagen Prod

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4207001A (en) * 1976-05-24 1980-06-10 The University Of Queensland Particle size analyzer
CN107345918A (en) * 2017-08-16 2017-11-14 广西大学 A kind of board quality testing apparatus and method
CN107345918B (en) * 2017-08-16 2023-05-23 广西大学 Plate material quality detection device and method

Also Published As

Publication number Publication date
CA958792A (en) 1974-12-03
FR2127699A5 (en) 1972-10-13
DE2206126A1 (en) 1972-09-07
IT948549B (en) 1973-06-11

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Legal Events

Date Code Title Description
414F Notice of opposition given (sect. 14/1949)
414E Application relinquished (sect. 14/1949)
CSNS Application of which complete specification have been accepted and published, but patent is not sealed