JPS5535276A - Edge pin-hole detector - Google Patents

Edge pin-hole detector

Info

Publication number
JPS5535276A
JPS5535276A JP10891578A JP10891578A JPS5535276A JP S5535276 A JPS5535276 A JP S5535276A JP 10891578 A JP10891578 A JP 10891578A JP 10891578 A JP10891578 A JP 10891578A JP S5535276 A JPS5535276 A JP S5535276A
Authority
JP
Japan
Prior art keywords
edge
pinhole
photoelectric converting
light
detection
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.)
Granted
Application number
JP10891578A
Other languages
Japanese (ja)
Other versions
JPS5717254B2 (en
Inventor
Shizuyoshi Sannomiya
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP10891578A priority Critical patent/JPS5535276A/en
Publication of JPS5535276A publication Critical patent/JPS5535276A/en
Publication of JPS5717254B2 publication Critical patent/JPS5717254B2/ja
Granted 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
    • G01N21/894—Pinholes
    • 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

  • 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)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

PURPOSE:To improve detection precision for edge pinholes by a simple constitution by tilting an optical filter to the surface of a detected belt body in a fixed direction as to inspection of the opaque belt body. CONSTITUTION:The edges of detection object 1 are fixed and light sources 241 and 242, and photoelectric converting methods 191 and 192 are provided; and swing- stop rollers 231 to 233 are arranged on the reverse surface side of the object and light penetrating the pinhole at the edge part of object 1 is detected by each photoelectric converting method 19 to detect the existence of a pinhole. The long axis of each light source 24 is made parallel to the endge part of object 1 and between the edge of object 1 and photoelectric converting methods 19, optical filters 211 and 212 are arranged. The surfaces confronting to edges of both optical filters 21 is so tilted that reflected from each light source 24 will fall on the outside of the edge. Therefore, projection light off the edge is removed and precision of the detection of the pinhole can be improved.
JP10891578A 1978-09-04 1978-09-04 Edge pin-hole detector Granted JPS5535276A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10891578A JPS5535276A (en) 1978-09-04 1978-09-04 Edge pin-hole detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10891578A JPS5535276A (en) 1978-09-04 1978-09-04 Edge pin-hole detector

Publications (2)

Publication Number Publication Date
JPS5535276A true JPS5535276A (en) 1980-03-12
JPS5717254B2 JPS5717254B2 (en) 1982-04-09

Family

ID=14496862

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10891578A Granted JPS5535276A (en) 1978-09-04 1978-09-04 Edge pin-hole detector

Country Status (1)

Country Link
JP (1) JPS5535276A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5862252U (en) * 1981-10-22 1983-04-26 コニカ株式会社 surface inspection equipment
JPS5865559U (en) * 1981-10-27 1983-05-04 東英電子工業株式会社 Pinhole detection mechanism
KR100573561B1 (en) * 2001-12-24 2006-04-25 주식회사 포스코 Pin-hole detector with edge filter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5228776B2 (en) * 2008-10-09 2013-07-03 新日鐵住金株式会社 Hole defect detection apparatus and hole defect detection method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5862252U (en) * 1981-10-22 1983-04-26 コニカ株式会社 surface inspection equipment
JPH0125311Y2 (en) * 1981-10-22 1989-07-28
JPS5865559U (en) * 1981-10-27 1983-05-04 東英電子工業株式会社 Pinhole detection mechanism
KR100573561B1 (en) * 2001-12-24 2006-04-25 주식회사 포스코 Pin-hole detector with edge filter

Also Published As

Publication number Publication date
JPS5717254B2 (en) 1982-04-09

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