GB1214201A - Improvements relating to the examination of ground surfaces - Google Patents

Improvements relating to the examination of ground surfaces

Info

Publication number
GB1214201A
GB1214201A GB2528468A GB2528468A GB1214201A GB 1214201 A GB1214201 A GB 1214201A GB 2528468 A GB2528468 A GB 2528468A GB 2528468 A GB2528468 A GB 2528468A GB 1214201 A GB1214201 A GB 1214201A
Authority
GB
United Kingdom
Prior art keywords
facets
edge
prism
blade
substantially constant
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
GB2528468A
Inventor
John Yarnell
Stanley Holden
Cyril Spalding
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.)
Hawker Siddeley Dynamics Ltd
Original Assignee
Hawker Siddeley Dynamics 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 Hawker Siddeley Dynamics Ltd filed Critical Hawker Siddeley Dynamics Ltd
Priority to DE19691926979 priority Critical patent/DE1926979A1/en
Priority to FR6917163A priority patent/FR2009405A1/fr
Publication of GB1214201A publication Critical patent/GB1214201A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

1,214,201. Beam Splitters. HAWKER SIDDELEY DYNAMICS Ltd. May 27, 1969 [March 1, 1968; May 27, 1968], Nos. 10186/68 and 25284/68. Heading G2J. [Also in Division G1] In an arrangement for examining the ground edge facets of a razor blade a beam of coherent light is used to illuminate the edge and the reflected beams are used to determine the angles and widths of the facets by means of photodetectors. Beam 20 of coherent light is made to traverse path (a) and (b) alternately by means of split prism SP rotating about an axis normal to the paper. Beam (a) illuminates the whole width of the facets 13, 13a and reflects a beam 21 to detector P. Since the angle of the incident beam changes linearly with time; joints 24, 24<SP>1</SP> being conjugate with request to lens L2, the output beam rotates about the edge of the blade at substantially constant rate so that the angle of the facets can be determined. Beam (a) is produced by total internal reflection occurring in the prism. When the prism rotates further the beam passes through and is reflected by mirror M onto the edge of the blade. This beam travels at substantially constant rate across the facet and is detected at P1, P2 so that the facet width can be determined.
GB2528468A 1968-03-01 1968-03-01 Improvements relating to the examination of ground surfaces Expired GB1214201A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19691926979 DE1926979A1 (en) 1968-05-27 1969-05-24 Method for testing ground surfaces of a workpiece, in particular a razor blade
FR6917163A FR2009405A1 (en) 1968-05-27 1969-05-27

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1018668 1968-03-01

Publications (1)

Publication Number Publication Date
GB1214201A true GB1214201A (en) 1970-12-02

Family

ID=9963140

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2528468A Expired GB1214201A (en) 1968-03-01 1968-03-01 Improvements relating to the examination of ground surfaces

Country Status (1)

Country Link
GB (1) GB1214201A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003302206A (en) * 2002-03-28 2003-10-24 General Electric Co <Ge> Method for locating edge in three dimensions using side illumination

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003302206A (en) * 2002-03-28 2003-10-24 General Electric Co <Ge> Method for locating edge in three dimensions using side illumination
JP4515036B2 (en) * 2002-03-28 2010-07-28 ゼネラル・エレクトリック・カンパニイ Method of determining the position of the three-dimensional edge by side lighting

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Legal Events

Date Code Title Description
PS Patent sealed
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PLNP Patent lapsed through nonpayment of renewal fees