GB898828A - Improvements in or relating to the examination of transparent sheet material - Google Patents

Improvements in or relating to the examination of transparent sheet material

Info

Publication number
GB898828A
GB898828A GB2201159A GB2201159A GB898828A GB 898828 A GB898828 A GB 898828A GB 2201159 A GB2201159 A GB 2201159A GB 2201159 A GB2201159 A GB 2201159A GB 898828 A GB898828 A GB 898828A
Authority
GB
United Kingdom
Prior art keywords
sheet
flaw
photo
glass
flaws
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
GB2201159A
Inventor
Gordon Thomas Winch
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB2201159A priority Critical patent/GB898828A/en
Publication of GB898828A publication Critical patent/GB898828A/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
    • G01N21/892—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)

Abstract

898,828. Drilling. GENERAL ELECTRIC CO. Ltd. May 16, 1960 [June 26, 1959], No. 22011/59. Class 83 (3). [Also in Groups XIX, XXIII and XL (b)] A method of detecting and locating internal flaws in transparent sheet material 2 comprises directing light from a source 5 on to an edge of the material and so causing any internal flaws F to be illuminated by internally reflected light and their positions to be marked by the presence of relatively bright areas on the surface of the material. A continuous glass sheet 2 is fed over rollers 1 and passes between a pair of tubular incandescent lamps 5 each arranged to focus an image of its filament on the edge of the sheet 2. If there is an internal flaw in the glass as at F a relatively bright spot formed by internally reflected light will appear on the surface of the sheet as the flaw passes between the lamps 5. The bright spot is detected by a photo-sensitive device 10 which is one of a number arranged to cover the width of the sheet. The output signal is passed to an amplifier and a delay device and can be used to operate a drill to drill out the flaw. If desired a warning can be given when a flaw has been detected and a counter may register the total number of flaws. The apparatus may also be used for examining single sheets of glass which are then directed into one or other of two reception channels depending upon the presence or absence of flaws. In addition to the edge illumination a light projector may be located on one side of the sheet and arranged to project light through the sheet from one face to the other. This will indicate surface faults if used with a photo-sensitive device as described above. In this case the two types of fault may be indicated differently. In a modification the array of photo-sensitive devices is replaced by a rotatable drum mounted above the conveyer with its axis extending in the direction of movement thereof. The drum carries on its periphery a system of mirrors so that as it rotates a single photo-sensitive device scans the whole width of the sheet of glass.
GB2201159A 1959-06-26 1959-06-26 Improvements in or relating to the examination of transparent sheet material Expired GB898828A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2201159A GB898828A (en) 1959-06-26 1959-06-26 Improvements in or relating to the examination of transparent sheet material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2201159A GB898828A (en) 1959-06-26 1959-06-26 Improvements in or relating to the examination of transparent sheet material

Publications (1)

Publication Number Publication Date
GB898828A true GB898828A (en) 1962-06-14

Family

ID=10172490

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2201159A Expired GB898828A (en) 1959-06-26 1959-06-26 Improvements in or relating to the examination of transparent sheet material

Country Status (1)

Country Link
GB (1) GB898828A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4340300A (en) * 1980-08-11 1982-07-20 Siemens Corporation Input sensor unit for a fingerprint identification system
EP0071202A1 (en) * 1981-07-29 1983-02-09 Intec Corporation Method and apparatus for optically inspecting a moving web of glass
US4456374A (en) * 1981-12-11 1984-06-26 Johnson & Johnson Detecting the presence or absence of a coating on a substrate
WO1987007023A1 (en) * 1986-05-05 1987-11-19 Hughes Aircraft Company Self contained surface contamination sensor
GB2331805A (en) * 1997-11-26 1999-06-02 Glaverbel Defect detection in thin transparent sheets
CN111912860A (en) * 2020-08-17 2020-11-10 华辉玻璃(中国)有限公司 Rapid detection system for glass flaws

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4340300A (en) * 1980-08-11 1982-07-20 Siemens Corporation Input sensor unit for a fingerprint identification system
EP0071202A1 (en) * 1981-07-29 1983-02-09 Intec Corporation Method and apparatus for optically inspecting a moving web of glass
US4456374A (en) * 1981-12-11 1984-06-26 Johnson & Johnson Detecting the presence or absence of a coating on a substrate
WO1987007023A1 (en) * 1986-05-05 1987-11-19 Hughes Aircraft Company Self contained surface contamination sensor
US4808813A (en) * 1986-05-05 1989-02-28 Hughes Aircraft Company Self contained surface contamination sensor for detecting external particulates and surface discontinuities
GB2331805A (en) * 1997-11-26 1999-06-02 Glaverbel Defect detection in thin transparent sheets
CN111912860A (en) * 2020-08-17 2020-11-10 华辉玻璃(中国)有限公司 Rapid detection system for glass flaws
CN111912860B (en) * 2020-08-17 2023-05-09 华辉玻璃(中国)有限公司 Rapid detection system for glass flaws

Similar Documents

Publication Publication Date Title
US2570288A (en) Photoelectric inspection of sheet materials
GB1424418A (en) Apparatus for detercting the skew of an opaque band material travelling on a delivery system
GB1341135A (en) Apparatus for inspecting filamentary material
US3718823A (en) Optical detectors for inspecting the condition of samples
GB1389444A (en) Apparatus for automatic inspection of materials
ES8106804A1 (en) Apparatus for inspecting translucent articles for faults.
US3589816A (en) Apparatus for detecting imperfections on a web
GB898828A (en) Improvements in or relating to the examination of transparent sheet material
EP0006648B1 (en) Method and device for inspecting a moving sheet material for streaklike defects
GB1091334A (en) Apparatus for detecting faults in webs
GB963587A (en) A device for indicating marks and the like on a surface
JPS52138183A (en) Inspecting apparatus for flaw
US2430526A (en) Apparatus for inspecting tin plate or the like
ES372099A1 (en) Radiation sensitive defect scanner for transparent materials
JPS5737253A (en) Defect detection device for transparent body
JPS56157841A (en) Detecting apparatus for surface defect of body
JPS56118646A (en) Flaw inspecting apparatus
JPS5734403A (en) Inspecting device for shape and defect of linear object
SE7401986L (en)
JPS5518926A (en) Flaw inspector for glass bottle drum
GB1407572A (en) Detection of faults in a resilient ring edge
JPS5236081A (en) Optical part for colorimeter
ES406936A1 (en) Method and apparatus for measuring optical irregularities in an article
JPS57111401A (en) External form inspector
GB2018985A (en) Detecting Flaws in Sheets