GB989649A - Optical apparatus - Google Patents

Optical apparatus

Info

Publication number
GB989649A
GB989649A GB3141162A GB3141162A GB989649A GB 989649 A GB989649 A GB 989649A GB 3141162 A GB3141162 A GB 3141162A GB 3141162 A GB3141162 A GB 3141162A GB 989649 A GB989649 A GB 989649A
Authority
GB
United Kingdom
Prior art keywords
optical
moirú
fringes
small angle
grating
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
GB3141162A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB3141162A priority Critical patent/GB989649A/en
Publication of GB989649A publication Critical patent/GB989649A/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

989,649. Optical apparatus. G. S. K. WONG. Nov. 15,1963 [Aug. 16,1962], No. 31411/62. Heading G2J. A member M, whose linear displacement is to be measured, is rigidly connected to an optical plate O having a front silvered surface S adjacent a second optical flate O<SP>1</SP> of clear glass inclined at a small angle and thereto so that an interference fringe pattern may be formed by monochromatic light from source T, the interference pattern being observed through a grating G so that MoirÚ fringes are seen. The grating placed on the surface of optical flat O<SP>1</SP>, with its rulings set at a small angle to the bands of the interference fringe pattern, and the MoirÚ fringes may be counted by photoelectric cell P, amplifier A and electronic decade counter K.
GB3141162A 1962-08-16 1962-08-16 Optical apparatus Expired GB989649A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3141162A GB989649A (en) 1962-08-16 1962-08-16 Optical apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3141162A GB989649A (en) 1962-08-16 1962-08-16 Optical apparatus

Publications (1)

Publication Number Publication Date
GB989649A true GB989649A (en) 1965-04-22

Family

ID=10322715

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3141162A Expired GB989649A (en) 1962-08-16 1962-08-16 Optical apparatus

Country Status (1)

Country Link
GB (1) GB989649A (en)

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