SE8903080D0 - PROCEDURES FOR OPTICAL OUTLINE - Google Patents

PROCEDURES FOR OPTICAL OUTLINE

Info

Publication number
SE8903080D0
SE8903080D0 SE8903080A SE8903080A SE8903080D0 SE 8903080 D0 SE8903080 D0 SE 8903080D0 SE 8903080 A SE8903080 A SE 8903080A SE 8903080 A SE8903080 A SE 8903080A SE 8903080 D0 SE8903080 D0 SE 8903080D0
Authority
SE
Sweden
Prior art keywords
image
screen
laser
depicted
processing system
Prior art date
Application number
SE8903080A
Other languages
Swedish (sv)
Other versions
SE467757B (en
SE8903080L (en
Inventor
Aa Carlsson
Original Assignee
Volvo 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 Volvo Ab filed Critical Volvo Ab
Priority to SE8903080A priority Critical patent/SE467757B/en
Publication of SE8903080D0 publication Critical patent/SE8903080D0/en
Publication of SE8903080L publication Critical patent/SE8903080L/en
Publication of SE467757B publication Critical patent/SE467757B/en

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
    • G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • G01N21/9515—Objects of complex shape, e.g. examined with use of a surface follower device
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
    • 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
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/55—Specular reflectivity
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General 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)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

The invention relates to a method for optical inspection of the surface 2 of an object 1. Light from a laser-light source 4 is formed, by means of a lens system 5, into a line which is swept across the surface 2. The light reflected from the surface 2 is depicted on a screen 6 and, from the image depicted on the screen 6, information is gathered for assessing the quality of the surface 2. The line across the surface 2 of the object 1 where the surface 2 is met by the laser light incident from the laser-light source 4 is kept essentially constant in its spatial extent while the object 1 is moved relative to the laser-light source 4 and the screen 6. Information about the image depicted on the screen 6 is recorded by a photoelectric sensor 7 and is fed into a computer-based image-processing system, assessment of the quality of the surface 2 being carried out automatically by the image- processing system. The presence of a defect in the surface 2 of the object 1 is inferred in the image- processing system from information about the image of the line depicted on the screen 6 by comparing its boundary area and/or length with a predetermined limit value for the boundary area and the length respectively. <IMAGE>
SE8903080A 1989-09-18 1989-09-18 Method for optical surface inspection SE467757B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE8903080A SE467757B (en) 1989-09-18 1989-09-18 Method for optical surface inspection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8903080A SE467757B (en) 1989-09-18 1989-09-18 Method for optical surface inspection

Publications (3)

Publication Number Publication Date
SE8903080D0 true SE8903080D0 (en) 1989-09-18
SE8903080L SE8903080L (en) 1991-03-19
SE467757B SE467757B (en) 1992-09-07

Family

ID=20376921

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8903080A SE467757B (en) 1989-09-18 1989-09-18 Method for optical surface inspection

Country Status (1)

Country Link
SE (1) SE467757B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105388129A (en) * 2015-10-16 2016-03-09 深圳大学 Road surface relative reflectivity testing device

Also Published As

Publication number Publication date
SE467757B (en) 1992-09-07
SE8903080L (en) 1991-03-19

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