GB815897A - Improvements relating to displacement measuring devices - Google Patents

Improvements relating to displacement measuring devices

Info

Publication number
GB815897A
GB815897A GB2859354A GB2859354A GB815897A GB 815897 A GB815897 A GB 815897A GB 2859354 A GB2859354 A GB 2859354A GB 2859354 A GB2859354 A GB 2859354A GB 815897 A GB815897 A GB 815897A
Authority
GB
United Kingdom
Prior art keywords
displacement
measuring devices
displacement measuring
improvements relating
scale
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
GB2859354A
Inventor
Roger Voles
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries Ltd
Filing date
Publication date
Application filed by EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Publication of GB815897A publication Critical patent/GB815897A/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)
  • Optical Transform (AREA)

Abstract

815,897. Machine-tool details. ELECTRIC & MUSICAL INDUSTRIES Ltd. Sept. 26, 1955 [Oct. 5, 1954], No. 28593/54. Drawings to Specification. Class 83 (3). [Also in Group XX] In order to measure a displacement of a machine-tool part, an optical grating is moved through the displacement to be measured, and the consequent displacement of a moire-fringe pattern is measured with a scale. Preferably, the scale co-operates with the fringe pattern to form a vernier arrangement (see Group XX).
GB2859354A 1954-10-05 Improvements relating to displacement measuring devices Expired GB815897A (en)

Publications (1)

Publication Number Publication Date
GB815897A true GB815897A (en) 1959-07-01

Family

ID=1741164

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2859354A Expired GB815897A (en) 1954-10-05 Improvements relating to displacement measuring devices

Country Status (1)

Country Link
GB (1) GB815897A (en)

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