GB1412990A - Method of detecting defects in transparent and semi transparent bodies - Google Patents

Method of detecting defects in transparent and semi transparent bodies

Info

Publication number
GB1412990A
GB1412990A GB5791772A GB5791772A GB1412990A GB 1412990 A GB1412990 A GB 1412990A GB 5791772 A GB5791772 A GB 5791772A GB 5791772 A GB5791772 A GB 5791772A GB 1412990 A GB1412990 A GB 1412990A
Authority
GB
United Kingdom
Prior art keywords
transparent
defects
glass
detecting defects
scattered
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
GB5791772A
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.)
AGC Inc
Original Assignee
Asahi Glass Co Ltd
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 Asahi Glass Co Ltd filed Critical Asahi Glass Co Ltd
Priority to GB5791772A priority Critical patent/GB1412990A/en
Publication of GB1412990A publication Critical patent/GB1412990A/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)
  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

1412990 Detecting defects in a glass sheet ASAHI GLASS CO Ltd 15 Dec 1972 57917/72 Heading G I A In a device for detecting defects in transparent material 22 having a figured surface on one side and a smooth surface on the opposite side, a detector 27 is positioned outside the normal beam paths or regions to only receive scattered light from sources 11 and 21, as shown, that has passed through or scattered off a defect in the material. Fig.5 shows a series of equal intensity distribution curves a, b 1 , b 2 due to normal transmitted and reflected parallel light and a series a', b', due to different kinds of defects (inside the glass or on the smooth surface of the glass), and the detector 27 is positioned, as shown, such that it only receives light scattered from these defects.
GB5791772A 1972-12-15 1972-12-15 Method of detecting defects in transparent and semi transparent bodies Expired GB1412990A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5791772A GB1412990A (en) 1972-12-15 1972-12-15 Method of detecting defects in transparent and semi transparent bodies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5791772A GB1412990A (en) 1972-12-15 1972-12-15 Method of detecting defects in transparent and semi transparent bodies

Publications (1)

Publication Number Publication Date
GB1412990A true GB1412990A (en) 1975-11-05

Family

ID=10480369

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5791772A Expired GB1412990A (en) 1972-12-15 1972-12-15 Method of detecting defects in transparent and semi transparent bodies

Country Status (1)

Country Link
GB (1) GB1412990A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4245913A (en) * 1977-03-22 1981-01-20 Sarlos Seppo Edvard Scanning and detecting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4245913A (en) * 1977-03-22 1981-01-20 Sarlos Seppo Edvard Scanning and detecting device

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee