ZA918798B - Method and apparatus for determining the optical quality of a transparent plate - Google Patents

Method and apparatus for determining the optical quality of a transparent plate

Info

Publication number
ZA918798B
ZA918798B ZA918798A ZA918798A ZA918798B ZA 918798 B ZA918798 B ZA 918798B ZA 918798 A ZA918798 A ZA 918798A ZA 918798 A ZA918798 A ZA 918798A ZA 918798 B ZA918798 B ZA 918798B
Authority
ZA
South Africa
Prior art keywords
determining
transparent plate
optical quality
optical
quality
Prior art date
Application number
ZA918798A
Other languages
English (en)
Inventor
Joachim Dr Ing Bretschneider
Bretschneider Dr Ing Joachim
Original Assignee
Flachglas Ag
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 Flachglas Ag filed Critical Flachglas Ag
Publication of ZA918798B publication Critical patent/ZA918798B/xx

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
    • G01N21/958—Inspecting transparent materials or objects, e.g. windscreens
    • 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
    • G01N2021/8967—Discriminating defects on opposite sides or at different depths of sheet or rod

Landscapes

  • 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 Or Analysing Materials By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Manufacturing Optical Record Carriers (AREA)
ZA918798A 1990-11-06 1991-11-06 Method and apparatus for determining the optical quality of a transparent plate ZA918798B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4035168A DE4035168A1 (de) 1990-11-06 1990-11-06 Verfahren und vorrichtung zur bestimmung der optischen qualitaet einer transparenten platte

Publications (1)

Publication Number Publication Date
ZA918798B true ZA918798B (en) 1992-08-26

Family

ID=6417687

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA918798A ZA918798B (en) 1990-11-06 1991-11-06 Method and apparatus for determining the optical quality of a transparent plate

Country Status (16)

Country Link
US (1) US5210592A (xx)
EP (1) EP0485043B1 (xx)
JP (1) JPH0776752B2 (xx)
AR (1) AR246351A1 (xx)
AT (1) ATE115288T1 (xx)
AU (1) AU640058B2 (xx)
BR (1) BR9104819A (xx)
DE (2) DE4035168A1 (xx)
DK (1) DK0485043T3 (xx)
ES (1) ES2067142T3 (xx)
FI (1) FI101750B (xx)
GR (1) GR3015315T3 (xx)
MX (1) MX9101932A (xx)
PL (1) PL167918B1 (xx)
RU (1) RU2072510C1 (xx)
ZA (1) ZA918798B (xx)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9205655D0 (en) * 1992-03-14 1992-04-29 Roke Manor Research Improvements in or relating to surface curvature measurement
WO1994008229A1 (en) * 1992-09-29 1994-04-14 The University Of Queensland Detection of defects in glass
DE4318358C2 (de) * 1993-05-28 1996-09-05 Visolux Elektronik Gmbh Verfahren und Vorrichtung zum Messen von Streulicht erzeugenden Oberflächenfehlern von optischen Medien, wie Glas oder Kunststoff, insbesondere von Fahrzeugscheiben
ES2076083B1 (es) * 1993-06-04 1996-06-01 Fuesca Sl Aparato y metodo de medida y control de la densidad de reticulacion de los tratamientos en caliente y frio del vidrio aligerado.
US5726749A (en) * 1996-09-20 1998-03-10 Libbey-Owens-Ford Co. Method and apparatus for inspection and evaluation of angular deviation and distortion defects for transparent sheets
US5724140A (en) * 1996-10-28 1998-03-03 Ford Motor Company Method and apparatus for determining the quality of flat glass sheet
US5880843A (en) * 1997-09-03 1999-03-09 Vitro Flotado, S.A. De C.V. Apparatus and method for determining the optical distortion of a transparent substrate
US6285451B1 (en) * 1999-04-30 2001-09-04 John M. Herron Noncontacting optical method for determining thickness and related apparatus
US6359686B1 (en) * 1999-06-29 2002-03-19 Corning Incorporated Inspection system for sheet material
DE10027473B4 (de) * 2000-06-02 2007-04-19 Basler Ag Verfahren zum Ermitteln der Neigungen von wenigstens zwei übereinander angeordneten Flächen
US6985231B2 (en) * 2001-09-20 2006-01-10 Strainoptics, Inc. Method and apparatus for measuring the optical quality of a reflective surface
US6857937B2 (en) * 2002-05-30 2005-02-22 Komag, Inc. Lapping a head while powered up to eliminate expansion of the head due to heating
US7435941B2 (en) * 2003-03-14 2008-10-14 Inphase Technologies, Inc. Methods for measuring optical characteristics by differential diffractive scanning
DE102004005019A1 (de) * 2004-01-30 2005-08-18 Isra Glass Vision Gmbh Verfahren zur Bestimmung der Tiefe eines Fehlers in einem Glasband
JP2005233773A (ja) * 2004-02-19 2005-09-02 Denso Corp 距離検出装置
DE102004010311A1 (de) 2004-03-03 2005-09-22 Isra Glass Vision Gmbh Vorrichtung und Verfahren zur Messung der Dicke einer transparenten Probe
US8023110B1 (en) * 2007-02-07 2011-09-20 Kla-Tencor Corporation Priori crack detection in solar photovoltaic wafers by detecting bending at edges of wafers
WO2011155447A1 (ja) 2010-06-07 2011-12-15 旭硝子株式会社 形状測定装置、形状測定方法、およびガラス板の製造方法
BR112012031749B1 (pt) 2010-06-15 2020-02-18 AGC Inc. Dispositivo de medição de forma, método de medição de forma, e método de fabricação de placa de vidro
CN102455290B (zh) * 2010-10-18 2013-03-27 北京众智同辉科技有限公司 电致液晶雾化玻璃光学不均匀性的测试方法
RU2475726C1 (ru) * 2011-06-16 2013-02-20 Некоммерческая организация Научно-техническое учреждение "Инженерно-технический центр" открытого акционерного общества "Ижевский мотозавод "Аксион-холдинг" (НТУ "ИТЦ") Устройство контроля качества стекла
KR101700109B1 (ko) * 2015-02-03 2017-02-13 연세대학교 산학협력단 결함 분포 3차원 광 계측 장치 및 방법
KR102492294B1 (ko) * 2016-11-02 2023-01-27 코닝 인코포레이티드 투명 기판 상의 결함 검사 방법 및 장치, 및 입사광 조사 방법

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3799679A (en) * 1972-06-27 1974-03-26 Ppg Industries Inc Glass distortion scanning system
US3788750A (en) * 1972-12-06 1974-01-29 Libbey Owens Ford Co Inspecting glass
DE2847935A1 (de) * 1978-11-04 1980-05-14 Herbert Dipl Ing Dr Schreiner Vorrichtung zum automatischen auffinden von fehlern und/oder verschmutzungen an prueflingen aus transparenten plattenfoermigen werkstoffen, insbesondere flachglas
US4255055A (en) * 1979-05-11 1981-03-10 Libbey-Owens-Ford Company Surface inspection system for detecting flatness of planar sheet materials
DE3800053A1 (de) * 1988-01-04 1989-07-13 Sick Optik Elektronik Erwin Optische fehlerinspektionsvorrichtung
DE3816392A1 (de) * 1988-05-13 1989-11-23 Ver Glaswerke Gmbh Verfahren zur bestimmung der optischen qualitaet von flachglas oder flachglasprodukten

Also Published As

Publication number Publication date
JPH0776752B2 (ja) 1995-08-16
ES2067142T3 (es) 1995-03-16
FI915218A0 (fi) 1991-11-05
AU8698091A (en) 1992-05-14
EP0485043A2 (de) 1992-05-13
AR246351A1 (es) 1994-07-29
FI101750B1 (fi) 1998-08-14
EP0485043B1 (de) 1994-12-07
ATE115288T1 (de) 1994-12-15
BR9104819A (pt) 1992-06-23
US5210592A (en) 1993-05-11
RU2072510C1 (ru) 1997-01-27
DE4035168A1 (de) 1992-05-07
AU640058B2 (en) 1993-08-12
EP0485043A3 (en) 1992-12-09
DE59103804D1 (de) 1995-01-19
PL292250A1 (en) 1992-08-24
GR3015315T3 (en) 1995-06-30
FI101750B (fi) 1998-08-14
JPH05209840A (ja) 1993-08-20
FI915218A (fi) 1992-05-07
DK0485043T3 (da) 1995-05-01
PL167918B1 (pl) 1995-12-30
MX9101932A (es) 1992-07-08

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