GB969242A - Improvements in and relating to optical measuring and gauging equipment - Google Patents

Improvements in and relating to optical measuring and gauging equipment

Info

Publication number
GB969242A
GB969242A GB4354661A GB4354661A GB969242A GB 969242 A GB969242 A GB 969242A GB 4354661 A GB4354661 A GB 4354661A GB 4354661 A GB4354661 A GB 4354661A GB 969242 A GB969242 A GB 969242A
Authority
GB
United Kingdom
Prior art keywords
gratings
width
fringes
different
relating
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
GB4354661A
Inventor
Conrad Reginald Cooke
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.)
WATSON MANASTY AND CO Ltd
Original Assignee
WATSON MANASTY AND CO 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 WATSON MANASTY AND CO Ltd filed Critical WATSON MANASTY AND CO Ltd
Priority to GB4354661A priority Critical patent/GB969242A/en
Publication of GB969242A publication Critical patent/GB969242A/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)
  • Optical Transform (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)

Abstract

969,242. Diffraction gratings. WATSON, MANASTY & CO. Ltd. Nov. 21, 1962 [Dec. 5, 1961], No. 43546/61. Heading G2J. [Also in Division G1] A measuring device, wherein the position of a feeler 10 is indicated by fringes produced by passing light through two gratings 9, 21, one fixed and the other movable with the feeler, has gratings ruled so that the resulting fringes comprise light bands of width, at least at one point, different from the width at the same point, of the adjacent dark band. The lines on the grating may be wedge shaped (Fig. 5) or be parallel but of different width from the intervening spaces. The fringes so produced, Figs. 2 and 4, are read against a scale. The gratings may be crossed or, if of different pitch, uncrossed or alternatively reflecting gratings can be used
GB4354661A 1961-12-05 1961-12-05 Improvements in and relating to optical measuring and gauging equipment Expired GB969242A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4354661A GB969242A (en) 1961-12-05 1961-12-05 Improvements in and relating to optical measuring and gauging equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4354661A GB969242A (en) 1961-12-05 1961-12-05 Improvements in and relating to optical measuring and gauging equipment

Publications (1)

Publication Number Publication Date
GB969242A true GB969242A (en) 1964-09-09

Family

ID=10429245

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4354661A Expired GB969242A (en) 1961-12-05 1961-12-05 Improvements in and relating to optical measuring and gauging equipment

Country Status (1)

Country Link
GB (1) GB969242A (en)

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