GB906947A - Detection of defects in sheet glass - Google Patents

Detection of defects in sheet glass

Info

Publication number
GB906947A
GB906947A GB3689960A GB3689960A GB906947A GB 906947 A GB906947 A GB 906947A GB 3689960 A GB3689960 A GB 3689960A GB 3689960 A GB3689960 A GB 3689960A GB 906947 A GB906947 A GB 906947A
Authority
GB
United Kingdom
Prior art keywords
glass
defects
type
light
photo
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
GB3689960A
Other languages
English (en)
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.)
PPG Industries Inc
Original Assignee
Pittsburgh Plate Glass 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
Priority claimed from US850312A external-priority patent/US3199401A/en
Application filed by Pittsburgh Plate Glass Co filed Critical Pittsburgh Plate Glass Co
Publication of GB906947A publication Critical patent/GB906947A/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
    • 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

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)
GB3689960A 1959-11-02 1960-10-27 Detection of defects in sheet glass Expired GB906947A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US85034759A 1959-11-02 1959-11-02
US85030459A 1959-11-02 1959-11-02
US850312A US3199401A (en) 1959-11-02 1959-11-02 Method and apparatus for optically detecting elongated defects in glass

Publications (1)

Publication Number Publication Date
GB906947A true GB906947A (en) 1962-09-26

Family

ID=27420350

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3689960A Expired GB906947A (en) 1959-11-02 1960-10-27 Detection of defects in sheet glass

Country Status (4)

Country Link
BE (1) BE596651A (US06342305-20020129-C00040.png)
DE (2) DE1298736B (US06342305-20020129-C00040.png)
GB (1) GB906947A (US06342305-20020129-C00040.png)
NL (3) NL6603092A (US06342305-20020129-C00040.png)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3688235A (en) * 1965-03-31 1972-08-29 Inst Nat Du Verre Apparatus for detecting the angular deflection imparted to a beam passing through a transparent sheet
US4097151A (en) * 1976-03-16 1978-06-27 Ppg Industries, Inc. Method of and apparatus for locating B type and point type defects in a glass ribbon
CN112683792A (zh) * 2020-11-23 2021-04-20 光子(深圳)精密科技有限公司 一种石墨片外观缺陷的系统
CN115355824A (zh) * 2022-10-20 2022-11-18 长沙巨翊医疗科技有限公司 一种透光管图像获取方法、管径测量方法及装置
CN111612020B (zh) * 2019-02-22 2024-04-26 杭州海康威视数字技术股份有限公司 一种异常被检物的定位方法以及安检分析设备、系统

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3815998A (en) * 1972-10-30 1974-06-11 Ibm Surface contrast system and method
DE3800053A1 (de) * 1988-01-04 1989-07-13 Sick Optik Elektronik Erwin Optische fehlerinspektionsvorrichtung
DE3806382A1 (de) * 1988-02-29 1989-09-07 Feldmuehle Ag Verfahren und vorrichtung zum pruefen von laufenden transparenten bahnen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735017A (en) * 1956-02-14 beard ettal
US1874217A (en) * 1930-07-01 1932-08-30 Pittsburgh Plate Glass Co Glass inspection apparatus
US2393631A (en) * 1940-11-27 1946-01-29 Ilford Ltd Testing of photographic films, plates, and papers
DE748025C (de) * 1941-05-22 1944-10-25 Glastechnische Ges E V Deutsch Verfahren zum Pruefen von durchsichtigen oder reflektierenden undurchsichtigen Koerpern durch zahlenmaessige Ermittleung der durch sie hervorgerufenen Bildverzerrungen, insbesondere zum Pruefen von Flachglas
US2898801A (en) * 1955-06-09 1959-08-11 Robotron Corp Inspection device for detecting differences in two objects
US3199401A (en) * 1959-11-02 1965-08-10 Pittsburgh Plate Glass Co Method and apparatus for optically detecting elongated defects in glass

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3688235A (en) * 1965-03-31 1972-08-29 Inst Nat Du Verre Apparatus for detecting the angular deflection imparted to a beam passing through a transparent sheet
US4097151A (en) * 1976-03-16 1978-06-27 Ppg Industries, Inc. Method of and apparatus for locating B type and point type defects in a glass ribbon
CN111612020B (zh) * 2019-02-22 2024-04-26 杭州海康威视数字技术股份有限公司 一种异常被检物的定位方法以及安检分析设备、系统
CN112683792A (zh) * 2020-11-23 2021-04-20 光子(深圳)精密科技有限公司 一种石墨片外观缺陷的系统
CN112683792B (zh) * 2020-11-23 2023-08-29 光子(深圳)精密科技有限公司 一种石墨片外观缺陷检测系统
CN115355824A (zh) * 2022-10-20 2022-11-18 长沙巨翊医疗科技有限公司 一种透光管图像获取方法、管径测量方法及装置

Also Published As

Publication number Publication date
DE1298306B (de) 1969-06-26
NL257509A (US06342305-20020129-C00040.png)
DE1298736B (de) 1969-07-03
NL6603093A (US06342305-20020129-C00040.png) 1966-06-27
NL6603092A (US06342305-20020129-C00040.png) 1966-06-27
BE596651A (fr) 1961-05-02

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