GB782831A - Improvements relating to apparatus for measuring small movements - Google Patents

Improvements relating to apparatus for measuring small movements

Info

Publication number
GB782831A
GB782831A GB2005054A GB2005054A GB782831A GB 782831 A GB782831 A GB 782831A GB 2005054 A GB2005054 A GB 2005054A GB 2005054 A GB2005054 A GB 2005054A GB 782831 A GB782831 A GB 782831A
Authority
GB
United Kingdom
Prior art keywords
grating
july
photo
measure
cell
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
GB2005054A
Inventor
James Dyson
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 Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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 Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB2005054A priority Critical patent/GB782831A/en
Publication of GB782831A publication Critical patent/GB782831A/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)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

782,831. Photo-electric measuring. ASSOCIATED ELECTRICAL INDUSTRIES, Ltd. July 6, 1955 [July 8, 1954], No. 20050/54. Drawings to Specification. Class 40 (3). [Also in Group XX] The image of one diffraction grating is projected on to the same or another grating so that the grating lines are slightly mutually inclined to produce moirÚ fringes. The emergent light may fall on a photo-cell so that the movement of the fringes varies the output of the cell. Non- cyclical variation of the output may be used to measure or control the relative movement of the grating and grating image and the cyclical variation may be used to measure the relative movement by fringe counting by means of an electronic counting arrangement. Optical arrangements (see Group XX) for measuring linear and angular movements are described.
GB2005054A 1954-07-08 1954-07-08 Improvements relating to apparatus for measuring small movements Expired GB782831A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2005054A GB782831A (en) 1954-07-08 1954-07-08 Improvements relating to apparatus for measuring small movements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2005054A GB782831A (en) 1954-07-08 1954-07-08 Improvements relating to apparatus for measuring small movements

Publications (1)

Publication Number Publication Date
GB782831A true GB782831A (en) 1957-09-11

Family

ID=10139534

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2005054A Expired GB782831A (en) 1954-07-08 1954-07-08 Improvements relating to apparatus for measuring small movements

Country Status (1)

Country Link
GB (1) GB782831A (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1136834B (en) * 1959-04-09 1962-09-20 Leitz Ernst Gmbh Device for measuring changes in position
DE1145807B (en) * 1958-01-21 1963-03-21 Philips Nv Device for measuring changes in the position of a movable organ in relation to a reference system
DE1172438B (en) * 1959-04-23 1964-06-18 Philips Nv Device for measuring adjustment movements according to size and direction using a grid
US3166624A (en) * 1961-05-05 1965-01-19 Bausch & Lomb Moire fringe device having line grids of gradually changing pitch
US3230827A (en) * 1958-04-07 1966-01-25 Frederic W Olmstead Light flux interrupting system for measuring displacements
US3244895A (en) * 1962-07-26 1966-04-05 Dynamics Res Corp Shaft encoders
US3245307A (en) * 1958-01-21 1966-04-12 Philips Corp Moire fringe apparatus for measuring small movements
US3246557A (en) * 1961-10-24 1966-04-19 Block Engineering Dispersive spectrometric modulation simulating interferometry
US3256770A (en) * 1962-04-10 1966-06-21 Carlson Co Chesley F Lithographic color analyzer
DE1226797B (en) * 1961-12-04 1966-10-13 Hensoldt & Soehne Optik Photoelectric device with optical grids as display means for displaying the change in position of a moving part
DE1235605B (en) * 1961-05-23 1967-03-02 British Aircraft Corp Ltd Measuring device for precise optical determination of the displacement of two parts that can move relative to one another
DE1259588B (en) * 1960-06-25 1968-01-25 Philips Nv Measuring device for determining the displacement of an object according to size and direction
DE1260803B (en) * 1961-07-05 1968-02-08 Hensoldt & Soehne M Device for setting and reading the angle of rotation of a circular disc carrying a scale
DE1773428B1 (en) * 1968-05-14 1971-03-18 Rolls Royce DEVICE FOR DETERMINING THE POSITION OF A MOVABLE STRUCTURE RELATIVE TO A FIXED REFERENCE SYSTEM
US3628870A (en) * 1970-07-02 1971-12-21 Olympus Optical Co Device for measuring amount of displacements with aid of gratings
US3854823A (en) * 1971-03-05 1974-12-17 Cranfield Inst Of Tech Measuring and counting systems
US4115008A (en) * 1976-05-08 1978-09-19 Ferranti Limited Displacement measuring apparatus

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1145807B (en) * 1958-01-21 1963-03-21 Philips Nv Device for measuring changes in the position of a movable organ in relation to a reference system
US3245307A (en) * 1958-01-21 1966-04-12 Philips Corp Moire fringe apparatus for measuring small movements
US3230827A (en) * 1958-04-07 1966-01-25 Frederic W Olmstead Light flux interrupting system for measuring displacements
DE1136834B (en) * 1959-04-09 1962-09-20 Leitz Ernst Gmbh Device for measuring changes in position
DE1172438B (en) * 1959-04-23 1964-06-18 Philips Nv Device for measuring adjustment movements according to size and direction using a grid
DE1259588B (en) * 1960-06-25 1968-01-25 Philips Nv Measuring device for determining the displacement of an object according to size and direction
US3166624A (en) * 1961-05-05 1965-01-19 Bausch & Lomb Moire fringe device having line grids of gradually changing pitch
DE1235605B (en) * 1961-05-23 1967-03-02 British Aircraft Corp Ltd Measuring device for precise optical determination of the displacement of two parts that can move relative to one another
DE1260803B (en) * 1961-07-05 1968-02-08 Hensoldt & Soehne M Device for setting and reading the angle of rotation of a circular disc carrying a scale
US3246557A (en) * 1961-10-24 1966-04-19 Block Engineering Dispersive spectrometric modulation simulating interferometry
DE1226797B (en) * 1961-12-04 1966-10-13 Hensoldt & Soehne Optik Photoelectric device with optical grids as display means for displaying the change in position of a moving part
US3280693A (en) * 1961-12-04 1966-10-25 Hensoldt Und Sohne M Scale reading apparatus
US3285123A (en) * 1961-12-04 1966-11-15 Hensoldt & Sohne M Scale reading apparatus
US3256770A (en) * 1962-04-10 1966-06-21 Carlson Co Chesley F Lithographic color analyzer
US3244895A (en) * 1962-07-26 1966-04-05 Dynamics Res Corp Shaft encoders
DE1773428B1 (en) * 1968-05-14 1971-03-18 Rolls Royce DEVICE FOR DETERMINING THE POSITION OF A MOVABLE STRUCTURE RELATIVE TO A FIXED REFERENCE SYSTEM
US3628870A (en) * 1970-07-02 1971-12-21 Olympus Optical Co Device for measuring amount of displacements with aid of gratings
US3854823A (en) * 1971-03-05 1974-12-17 Cranfield Inst Of Tech Measuring and counting systems
US4115008A (en) * 1976-05-08 1978-09-19 Ferranti Limited Displacement measuring apparatus

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