GB862290A - Improvements relating to optical apparatus for indicating the location of a body relative to a straight line - Google Patents

Improvements relating to optical apparatus for indicating the location of a body relative to a straight line

Info

Publication number
GB862290A
GB862290A GB1740957A GB1740957A GB862290A GB 862290 A GB862290 A GB 862290A GB 1740957 A GB1740957 A GB 1740957A GB 1740957 A GB1740957 A GB 1740957A GB 862290 A GB862290 A GB 862290A
Authority
GB
United Kingdom
Prior art keywords
line image
grating
rod
light source
location
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
GB1740957A
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 GB1740957A priority Critical patent/GB862290A/en
Publication of GB862290A publication Critical patent/GB862290A/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)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

862,290. Optical alignment apparatus, ASSOCIATED ELECTRICAL INDUSTRIES Ltd. May 29, 1958 [May 31, 1957], No. 17409/57. Class 97(1) In order to determine the location of a body relative to a straight line, a line image of a source is formed by a diffraction grating, and this line image and a reference mark attached to the body are viewed through means attached to the body. As shown in Fig. 4, the body T to be located includes an eye-piece E and cross-hairs W which are mounted on a rod D, axially displaceable under the control of a vernier screw M. In front of the body are disposed a light source S and a diffraction grating G, whereby a line image of the source is formed along a line through the centre of the grating. The body T can be placed so that the cross-hairs W appear to lie on this line image, or the body T can be set in a known position and the rod D adjusted until the crosshairs coincide with the line image. A reflecting grating may alternatively be used, in which case the light source is carried by the rod D. As a light source a second diffraction grating may be employed, the spacing of which is the same as that of the grating G, and arranged so that the central point is opaque. The apparatus may be used for aligning bearing housings, as of a turbine.
GB1740957A 1957-05-31 1957-05-31 Improvements relating to optical apparatus for indicating the location of a body relative to a straight line Expired GB862290A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1740957A GB862290A (en) 1957-05-31 1957-05-31 Improvements relating to optical apparatus for indicating the location of a body relative to a straight line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1740957A GB862290A (en) 1957-05-31 1957-05-31 Improvements relating to optical apparatus for indicating the location of a body relative to a straight line

Publications (1)

Publication Number Publication Date
GB862290A true GB862290A (en) 1961-03-08

Family

ID=10094689

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1740957A Expired GB862290A (en) 1957-05-31 1957-05-31 Improvements relating to optical apparatus for indicating the location of a body relative to a straight line

Country Status (1)

Country Link
GB (1) GB862290A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3269254A (en) * 1962-12-31 1966-08-30 Ibm Optical apparatus for indicating and measuring the roll angular orientation of a movable body
US3536378A (en) * 1965-04-01 1970-10-27 Troy R Bishop System for producing optical illusion of three-dimensional light beam
US6266187B1 (en) 1996-08-17 2001-07-24 Fryco Limited Substrate producing three-dimensional images

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3269254A (en) * 1962-12-31 1966-08-30 Ibm Optical apparatus for indicating and measuring the roll angular orientation of a movable body
US3536378A (en) * 1965-04-01 1970-10-27 Troy R Bishop System for producing optical illusion of three-dimensional light beam
US6266187B1 (en) 1996-08-17 2001-07-24 Fryco Limited Substrate producing three-dimensional images

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