GB1305980A - - Google Patents

Info

Publication number
GB1305980A
GB1305980A GB4971070A GB4971070A GB1305980A GB 1305980 A GB1305980 A GB 1305980A GB 4971070 A GB4971070 A GB 4971070A GB 4971070 A GB4971070 A GB 4971070A GB 1305980 A GB1305980 A GB 1305980A
Authority
GB
United Kingdom
Prior art keywords
web
width
band
faults
moving
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
GB4971070A
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 filed Critical
Publication of GB1305980A publication Critical patent/GB1305980A/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
    • G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
    • G01N21/896—Optical defects in or on transparent materials, e.g. distortion, surface flaws in conveyed flat sheet or rod
    • 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

Abstract

1305980 Detecting faults in moving web AGFA-GEVAERT AG 20 Oct 1970 [24 Oct 1969] 49710/70 Heading G1A [Also in Division G2] Faults in a moving transparent web 9, e.g. a photographic film, are detected using a scanning system including a mirror drum 13 at the focus of a parabolic mirror 11. A quartz iodine lamp 1, screened by box 3, together with parabolic mirror 4 and cylindrical lens 7 provide a beam in the form of a band of light 8 across the moving web 9. A filter 10 allows only infrared radiation to reach the web 9. On the other side of the web 9, the scanning system dimensions and rotation are much as to provide complete scanning coverage of the web by means of a line by line scan across the illuminated band. The field of view of detector 18, which may be a photodiode, or phototransistor, is restricted by a slit 15 which is initially ajustable in length and width, the length being set to the width of band 8 or smaller and the width to be sufficiently small to allow differentiation between different types of faults (lines, pinholes etc.) by discriminating devices in the detector circuit. If spherical mirrors on drum 13 are used, lens 14 may be dispenced with.
GB4971070A 1969-10-24 1970-10-20 Expired GB1305980A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691953635 DE1953635B2 (en) 1969-10-24 1969-10-24 DEVICE FOR DETERMINING OPTICALLY DETECTABLE DEFECTS IN A MOVING, OPTICALLY TRANSPARENT MATERIAL TRAIL

Publications (1)

Publication Number Publication Date
GB1305980A true GB1305980A (en) 1973-02-07

Family

ID=5749139

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4971070A Expired GB1305980A (en) 1969-10-24 1970-10-20

Country Status (4)

Country Link
BE (1) BE757900A (en)
DE (1) DE1953635B2 (en)
FR (1) FR2066486A5 (en)
GB (1) GB1305980A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102235979A (en) * 2010-04-22 2011-11-09 常州北星自动化科技有限公司 Detection device of appearance of mobile phone lens

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2816986C3 (en) * 1978-04-19 1986-03-27 Agfa-Gevaert Ag, 5090 Leverkusen Arrangement for searching for errors on moving tapes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102235979A (en) * 2010-04-22 2011-11-09 常州北星自动化科技有限公司 Detection device of appearance of mobile phone lens

Also Published As

Publication number Publication date
BE757900A (en) 1971-04-23
FR2066486A5 (en) 1971-08-06
DE1953635A1 (en) 1971-04-29
DE1953635B2 (en) 1976-09-09

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee