GB1149518A - Improvements in and relating to the optical detection of irregularities in sheet material - Google Patents

Improvements in and relating to the optical detection of irregularities in sheet material

Info

Publication number
GB1149518A
GB1149518A GB5211466A GB5211466A GB1149518A GB 1149518 A GB1149518 A GB 1149518A GB 5211466 A GB5211466 A GB 5211466A GB 5211466 A GB5211466 A GB 5211466A GB 1149518 A GB1149518 A GB 1149518A
Authority
GB
United Kingdom
Prior art keywords
light
photo
detect
bundles
fibre optic
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
GB5211466A
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.)
Feldmuehle AG
Original Assignee
Feldmuehle AG
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 Feldmuehle AG filed Critical Feldmuehle AG
Publication of GB1149518A publication Critical patent/GB1149518A/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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines

Abstract

1,149,518. Detecting flaws photo-electrically. FELDMœHLE A.G. Nov.21, 1966 [Nov. 20, 1965], No.52114/66. Heading G1A. [Also in Division G2] Products in web or sheet form are tested and sorted by scanning a spot of light across the web and detecting the light transmitted or reflected by the product using light conducting fibre bundles arranged over the whole width of the product. Light from a source 1 is scanned across the web 5 by a mirror drum 3, the light being focused to a moving point of light by the lens 6. The reflected light is collected by fibre optic bundles 9, 10 and fed to a photo-multiplier 12. The output ends of the fibre optic bundles are shaped to match the sensitive area of the photo-multiplier, and lenses may be provided at either end of the bundles. The fibre optic bundles may be arranged to receive (a) diffusely reflected light to detect discolorations (b) specularly reflected light to detect folds (c) directly transmitted light to detect holes (d) diffusely transmitted light to detect included foreign bodies. These fibre optic bundles may co-operate with different photo-multipliers, or (a), (b) and (d) may co-operate with the same photo-multiplier since they all respond to a flaw by a reduction of light intensity.
GB5211466A 1965-11-20 1966-11-21 Improvements in and relating to the optical detection of irregularities in sheet material Expired GB1149518A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF0047722 1965-11-20

Publications (1)

Publication Number Publication Date
GB1149518A true GB1149518A (en) 1969-04-23

Family

ID=7101795

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5211466A Expired GB1149518A (en) 1965-11-20 1966-11-21 Improvements in and relating to the optical detection of irregularities in sheet material

Country Status (5)

Country Link
DE (1) DE1573496A1 (en)
FR (1) FR1507380A (en)
GB (1) GB1149518A (en)
NL (1) NL6602384A (en)
SE (1) SE326052B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117897A (en) * 1982-03-03 1983-10-19 Sira Ltd Detecting surface defects

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7711138A (en) * 1976-11-01 1978-05-03 Ici Ltd DETECTION OF DISCONTINUITIES IN MOVING JOBS OF PLASTIC MATERIAL.
US4323311A (en) * 1979-05-11 1982-04-06 Sira Institute Limited Apparatus and method for detecting holes in sheet material
DE3006072C2 (en) * 1980-02-19 1984-11-29 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch Defect detection device for material webs
DE3713279C2 (en) * 1987-04-18 1994-01-20 Laser Sorter Gmbh Process for the detection of dimensional errors and / or the distortion of paper webs or format papers
DE3806385A1 (en) * 1988-02-29 1989-09-07 Feldmuehle Ag METHOD AND DEVICE FOR TESTING TRANSPARENT RAILS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117897A (en) * 1982-03-03 1983-10-19 Sira Ltd Detecting surface defects

Also Published As

Publication number Publication date
NL6602384A (en) 1967-05-22
FR1507380A (en) 1967-12-29
SE326052B (en) 1970-07-13
DE1573496A1 (en) 1970-04-16

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