GB1329240A - Optical measurement of the thickness of translucent objects - Google Patents

Optical measurement of the thickness of translucent objects

Info

Publication number
GB1329240A
GB1329240A GB1329240DA GB1329240A GB 1329240 A GB1329240 A GB 1329240A GB 1329240D A GB1329240D A GB 1329240DA GB 1329240 A GB1329240 A GB 1329240A
Authority
GB
United Kingdom
Prior art keywords
lens
article
thickness
light
angle
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
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.)
British Aircraft Corp Ltd
Original Assignee
British Aircraft Corp 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 British Aircraft Corp Ltd filed Critical British Aircraft Corp Ltd
Publication of GB1329240A publication Critical patent/GB1329240A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

1329240 Measuring thicknesses BRITISH AIRCRAFT CORP Ltd 4 Nov 1970 [11 Nov 1969] 55108/69 Heading G2J [Also in Division G1] The thickness t of a translucent article is measured by projecting light from a laser 1 through an orifice 2 and lens 4 at an angle α to the front surface 6 of the article so that the light is reflected from points P and Q on the front and rear faces 6, 7 of the article at angle # from the front surface on to a lens 8 at a distance u from the surface so that the lens focusses the light as two distinct images 9, 10 spaced apart a distance d on to a screen 11 spaced a distance v from the lens and using these measurements to calculate the thickness of the article according to the formula:- where # is the angle between two planes which intersect along the line N normal to the front surface at the point of impingement of the beam, which planes respectively contain the axis of the light beam and the optical axis of the lens and Á is the refractive index of the material of the article.
GB1329240D 1969-11-11 1969-11-11 Optical measurement of the thickness of translucent objects Expired GB1329240A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5510869 1969-11-11

Publications (1)

Publication Number Publication Date
GB1329240A true GB1329240A (en) 1973-09-05

Family

ID=10472984

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1329240D Expired GB1329240A (en) 1969-11-11 1969-11-11 Optical measurement of the thickness of translucent objects

Country Status (2)

Country Link
FR (1) FR2069220A5 (en)
GB (1) GB1329240A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU690966B2 (en) * 1994-02-18 1998-05-07 Saint-Gobain Cinematique Et Controle Method for measuring the thickness of a transparent material
GB2321309A (en) * 1997-01-21 1998-07-22 Neil Colin Hamilton Double glazing unit thickness measuring apparatus
CN104870932A (en) * 2012-10-18 2015-08-26 Msc&Sgcc公司 Facility for measuring the thickness of the wall of containers
IT201800005143A1 (en) * 2018-05-08 2019-11-08 Method for checking an object made of transparent material and related control system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2762083B1 (en) * 1997-04-11 1999-07-02 Verreries Souchon Neuvesel OPTICAL METHOD FOR MEASURING THE WALL THICKNESS AND / OR THE OVALIZATION OF A CONTAINER AND DEVICE USING THE SAME

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU690966B2 (en) * 1994-02-18 1998-05-07 Saint-Gobain Cinematique Et Controle Method for measuring the thickness of a transparent material
GB2321309A (en) * 1997-01-21 1998-07-22 Neil Colin Hamilton Double glazing unit thickness measuring apparatus
GB2321309B (en) * 1997-01-21 1999-08-04 Neil Colin Hamilton Thickness measuring apparatus
CN104870932A (en) * 2012-10-18 2015-08-26 Msc&Sgcc公司 Facility for measuring the thickness of the wall of containers
US20150276380A1 (en) * 2012-10-18 2015-10-01 Msc & Sgcc Facility for measuring the thickness of the wall of containers
JP2016500817A (en) * 2012-10-18 2016-01-14 エムエスセ エ エスジェセセＭｓｃ ＆ Ｓｇｃｃ Equipment for measuring wall thickness of containers
US9658057B2 (en) * 2012-10-18 2017-05-23 Msc & Sgcc Facility for measuring the thickness of the wall of containers
CN104870932B (en) * 2012-10-18 2018-07-03 Msc & Sgcc公司 For measuring the equipment of container wall thickness
IT201800005143A1 (en) * 2018-05-08 2019-11-08 Method for checking an object made of transparent material and related control system
WO2019215255A1 (en) * 2018-05-08 2019-11-14 Marposs Societa' Per Azioni Method for checking an object made of transparent material and corresponding checking system
CN112119281A (en) * 2018-05-08 2020-12-22 马波斯S.P.A.公司 Method for inspecting an object made of transparent material and corresponding inspection system
US11448602B2 (en) 2018-05-08 2022-09-20 Marposs Societa' Per Azioni Method for checking an object made of transparent material and corresponding checking system
CN112119281B (en) * 2018-05-08 2023-02-28 马波斯S.P.A.公司 Method for inspecting an object made of transparent material and corresponding inspection system

Also Published As

Publication number Publication date
FR2069220A5 (en) 1971-09-03

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees