CA1011582A - Optical method and apparatus for classifying surface defects - Google Patents

Optical method and apparatus for classifying surface defects

Info

Publication number
CA1011582A
CA1011582A CA230,015A CA230015A CA1011582A CA 1011582 A CA1011582 A CA 1011582A CA 230015 A CA230015 A CA 230015A CA 1011582 A CA1011582 A CA 1011582A
Authority
CA
Canada
Prior art keywords
surface defects
optical method
classifying surface
classifying
optical
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
CA230,015A
Other languages
English (en)
Inventor
Lars O.A. Millgard
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.)
Rederi Nordstjernan AB
Original Assignee
Rederi Nordstjernan AB
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 Rederi Nordstjernan AB filed Critical Rederi Nordstjernan AB
Application granted granted Critical
Publication of CA1011582A publication Critical patent/CA1011582A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
    • G02B27/46—Systems using spatial filters
    • 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

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Length Measuring Devices By Optical Means (AREA)
CA230,015A 1974-06-26 1975-06-24 Optical method and apparatus for classifying surface defects Expired CA1011582A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7408448A SE383204B (sv) 1974-06-26 1974-06-26 Sett for klassificering av ytfel hos materialytor.

Publications (1)

Publication Number Publication Date
CA1011582A true CA1011582A (en) 1977-06-07

Family

ID=20321557

Family Applications (1)

Application Number Title Priority Date Filing Date
CA230,015A Expired CA1011582A (en) 1974-06-26 1975-06-24 Optical method and apparatus for classifying surface defects

Country Status (6)

Country Link
JP (1) JPS5124290A ( )
AT (1) AT349242B ( )
CA (1) CA1011582A ( )
CH (1) CH597590A5 ( )
NL (1) NL7507639A ( )
SE (1) SE383204B ( )

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9812091D0 (en) * 1998-06-05 1998-08-05 Glaverbel Defect detecting unit

Also Published As

Publication number Publication date
JPS5124290A (ja) 1976-02-27
AT349242B (de) 1979-03-26
SE7408448L ( ) 1974-12-27
CH597590A5 (en) 1978-04-14
SE383204B (sv) 1976-03-01
NL7507639A (nl) 1975-12-30
ATA491075A (de) 1978-08-15

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