GB1174781A - Improvements in Positioning Systems - Google Patents

Improvements in Positioning Systems

Info

Publication number
GB1174781A
GB1174781A GB268966A GB268966A GB1174781A GB 1174781 A GB1174781 A GB 1174781A GB 268966 A GB268966 A GB 268966A GB 268966 A GB268966 A GB 268966A GB 1174781 A GB1174781 A GB 1174781A
Authority
GB
United Kingdom
Prior art keywords
pattern
markings
rings
jan
members
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
GB268966A
Inventor
Dennis Cockburn Brown
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.)
Associated Engineering Ltd
Original Assignee
Associated Engineering 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 Associated Engineering Ltd filed Critical Associated Engineering Ltd
Priority to GB268966A priority Critical patent/GB1174781A/en
Publication of GB1174781A publication Critical patent/GB1174781A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/36—Forming the light into pulses
    • G01D5/38—Forming the light into pulses by diffraction gratings

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Position Or Direction (AREA)

Abstract

1,174,781. Optically measuring relative displacement. ASSOCIATED ENG. Ltd. Jan. 20, 1967 [Jan. 20, 1966], No.2689/66. Headings G1A and G1M. [Also in Division G2] A positioning system comprises two members each carrying a pattern of concentric ring markings on a transparent support such that one pattern may be viewed through the other, the relative displacement of the members being determined by reference to the MoirÚ fringe pattern set up between the two ring markings. The markings may consist of Fresnel rings, or the radii of successive rings may increase as the square roots of their integers. The centre spot or zone may in each pattern consist of a further set of smaller concentric rings for fire adjustments. The system may be used to position machine tool components, or negatives used in colour printing, and the fringe patterns may control electronic positioning devices.
GB268966A 1966-01-20 1966-01-20 Improvements in Positioning Systems Expired GB1174781A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB268966A GB1174781A (en) 1966-01-20 1966-01-20 Improvements in Positioning Systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB268966A GB1174781A (en) 1966-01-20 1966-01-20 Improvements in Positioning Systems

Publications (1)

Publication Number Publication Date
GB1174781A true GB1174781A (en) 1969-12-17

Family

ID=9744059

Family Applications (1)

Application Number Title Priority Date Filing Date
GB268966A Expired GB1174781A (en) 1966-01-20 1966-01-20 Improvements in Positioning Systems

Country Status (1)

Country Link
GB (1) GB1174781A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129960A (en) * 1982-10-12 1984-05-23 Trade & Industry Secretary Of Alignment aid
GB2183364A (en) * 1985-11-22 1987-06-03 Gen Electric Plc Alignment using gratings having varying stripe pitch
DE102005016231A1 (en) * 2005-04-06 2006-10-12 Jenoptik Laser, Optik, Systeme Gmbh Optical system for manufacturing composite unit, has laser radiation bundle positioned perpendicular to upper surface of substrates, and display section at far-field of binary structures, where display unit displays diffraction pattern

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129960A (en) * 1982-10-12 1984-05-23 Trade & Industry Secretary Of Alignment aid
GB2183364A (en) * 1985-11-22 1987-06-03 Gen Electric Plc Alignment using gratings having varying stripe pitch
GB2183364B (en) * 1985-11-22 1989-10-04 Gen Electric Plc Alignment using gratings having varying stripe pitch
DE102005016231A1 (en) * 2005-04-06 2006-10-12 Jenoptik Laser, Optik, Systeme Gmbh Optical system for manufacturing composite unit, has laser radiation bundle positioned perpendicular to upper surface of substrates, and display section at far-field of binary structures, where display unit displays diffraction pattern
DE102005016231B4 (en) * 2005-04-06 2010-09-16 Jenoptik Laser, Optik, Systeme Gmbh Optical system and method of manufacturing a composite element of transparent plate-shaped substrates provided with micro-optical structures

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Legal Events

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