GB1103491A - Optically inspecting a band of material - Google Patents

Optically inspecting a band of material

Info

Publication number
GB1103491A
GB1103491A GB1512965A GB1512965A GB1103491A GB 1103491 A GB1103491 A GB 1103491A GB 1512965 A GB1512965 A GB 1512965A GB 1512965 A GB1512965 A GB 1512965A GB 1103491 A GB1103491 A GB 1103491A
Authority
GB
United Kingdom
Prior art keywords
film
detectors
detector
row
streak
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
GB1512965A
Inventor
Paul Anthony Burgo
John Henry Juengst
Alvin Emerson Lake
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak 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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of GB1103491A publication Critical patent/GB1103491A/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
    • G01N21/8903—Optical details; Scanning details using a multiple detector array

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)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

1,103,491. Photo-electric flow detection. EASTMAN KODAK CO. April 9, 1965, No. 15129/65. Heading G1A. To detect streaks running in a photographic film substantially along its length a single row of infrared sensitive resistors arranged across the width of the moving film is oscillated in the line of the row by not more than two detector widths so that infrared light specularly reflected from an area of the film containing the streak is received first by one detector then its adjacent one to produce a signal at the frequency of the oscillation and therefore indicative of a streak and not a speck which would produce a signal of a much higher frequency governed by the speed of travel of the film. In other arrangements the row of detectors is stationary and the parallel rays of lightilluminating the surface of the film oscillate angularly so that light from one area of the film is directed first to one detector then to its adjacent one, or alternatively both illumination means and the detectors may be stationary and the film caused to oscillate transversely in addition to moving. In all arrangements the detectors are divided up into groups along the row and one detector from each group, not necessarily the corresponding one of each group, is connected to an amplifying channel so that two adjacent detectors are not in the same channel to otherwise cancel each other out if detecting the edge of the streak. The amplifying channels are frequency selective to give particular prominence to either streaks or specks and the final positive or negative signals are fed via biased rectifiers to positive and negative bus-bars, the degree of bias determining the sensitivity of the system. All signals from the bars are fed to a memory store controlling the destiny of the film thereafter. One half of the detectors are connected to positive potential and the other half to negative potential to compensate for any fluctuations in the potential supply or lamp intensity.
GB1512965A 1965-04-28 1965-04-09 Optically inspecting a band of material Expired GB1103491A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEE0029197 1965-04-28

Publications (1)

Publication Number Publication Date
GB1103491A true GB1103491A (en) 1968-02-14

Family

ID=7073787

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1512965A Expired GB1103491A (en) 1965-04-28 1965-04-09 Optically inspecting a band of material

Country Status (3)

Country Link
BE (1) BE668611A (en)
DE (1) DE1473743A1 (en)
GB (1) GB1103491A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0793092A1 (en) * 1996-03-01 1997-09-03 BASF Magnetics GmbH Optical surface inspection apparatus for linearly moving tape-like material
WO2001042765A2 (en) * 1999-12-11 2001-06-14 Qualico Gmbh Device for detecting the characteristics of a moving paper web using an ir-light source
US6586739B2 (en) 1999-12-11 2003-07-01 Metso Automation Oy Device for detecting characteristics of a moving paper web

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1343114A (en) * 1970-06-08 1974-01-10 Agfa Gevaert Apparatus for the detection of irregularities in a material
GB2025037A (en) * 1978-06-26 1980-01-16 Agfa Gevaert Nv Photoelectric detection of flaws in sheets
EP0079851A1 (en) * 1981-11-04 1983-05-25 Ciba-Geigy Ag Method and device for inspecting sheet material
DE3446355C2 (en) * 1984-12-19 1986-11-06 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch Optical troubleshooting device
DE3544871A1 (en) * 1984-12-19 1986-09-11 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch Optical fault-finding device
DE19729005A1 (en) * 1997-07-07 1999-02-04 Siemens Ag Device for measuring cross profiles of certain properties of a running material web, in particular made of paper or cardboard

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0793092A1 (en) * 1996-03-01 1997-09-03 BASF Magnetics GmbH Optical surface inspection apparatus for linearly moving tape-like material
US5886789A (en) * 1996-03-01 1999-03-23 Emtec Magnetics Gmbh Optical surface testing means for linearly moving, tape-like materials
WO2001042765A2 (en) * 1999-12-11 2001-06-14 Qualico Gmbh Device for detecting the characteristics of a moving paper web using an ir-light source
WO2001042765A3 (en) * 1999-12-11 2002-03-28 Qualico Gmbh Device for detecting the characteristics of a moving paper web using an ir-light source
US6586739B2 (en) 1999-12-11 2003-07-01 Metso Automation Oy Device for detecting characteristics of a moving paper web
US6696685B2 (en) 1999-12-11 2004-02-24 Metso Paper Automation Oy Device for detecting properties of a moving web of paper with an infrared light source

Also Published As

Publication number Publication date
BE668611A (en)
DE1473743A1 (en) 1969-02-06

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