GB1207174A - Improvements in or relating to a method of, and apparatus suitable for use in measuring any change in length of an optical path between a source of optical radiation and a primary image of the source - Google Patents

Improvements in or relating to a method of, and apparatus suitable for use in measuring any change in length of an optical path between a source of optical radiation and a primary image of the source

Info

Publication number
GB1207174A
GB1207174A GB1363270A GB1363270A GB1207174A GB 1207174 A GB1207174 A GB 1207174A GB 1363270 A GB1363270 A GB 1363270A GB 1363270 A GB1363270 A GB 1363270A GB 1207174 A GB1207174 A GB 1207174A
Authority
GB
United Kingdom
Prior art keywords
source
change
optical path
length
disc
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
GB1363270A
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.)
Centre National de la Recherche Scientifique CNRS
Original Assignee
Centre National de la Recherche Scientifique CNRS
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
Priority claimed from FR77149A external-priority patent/FR1545565A/en
Application filed by Centre National de la Recherche Scientifique CNRS filed Critical Centre National de la Recherche Scientifique CNRS
Publication of GB1207174A publication Critical patent/GB1207174A/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
    • G01D5/28—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 deflection of beams of light, e.g. for direct optical indication
    • G01D5/30—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 deflection of beams of light, e.g. for direct optical indication the beams of light being detected by photocells

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

1,207,174. Photo-electric measuring apparatus. CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE. Sept. 21, 1967 [Sept.21, 1966; April 13, 1967], No.13632/70, Divided out of 1,207,173. Heading G1A. The measurement of any change in the length of an optical path between a light source 601 and an image thereof is carried out by the use of a rotating slotted disc 604 carrying on its front surface transparent members of known thickness 605, whereby the image is produced alternately in two positions, one in front of and the other behind the plane of the apertured disc and a photodetector detecting light passing therethrough. When the images are equally spaced in front of and behind the plane of the disc, equal intensities are received and any amplitude modulation superimposed on the chopper frequency in the detector output is thus indicative of a change in the optical path. The apparatus can be modified for detecting displacements of reflective surfaces, Figs.3, 4 (not shown) and used in the applications referred to in Specification 1, 207,173.
GB1363270A 1966-09-21 1967-09-21 Improvements in or relating to a method of, and apparatus suitable for use in measuring any change in length of an optical path between a source of optical radiation and a primary image of the source Expired GB1207174A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR77149A FR1545565A (en) 1966-09-21 1966-09-21 Optical position sensor and its applications
FR102612A FR92726E (en) 1966-09-21 1967-04-13 Optical position sensor and its applications.

Publications (1)

Publication Number Publication Date
GB1207174A true GB1207174A (en) 1970-09-30

Family

ID=26173214

Family Applications (2)

Application Number Title Priority Date Filing Date
GB1363270A Expired GB1207174A (en) 1966-09-21 1967-09-21 Improvements in or relating to a method of, and apparatus suitable for use in measuring any change in length of an optical path between a source of optical radiation and a primary image of the source
GB4310367A Expired GB1207173A (en) 1966-09-21 1967-09-21 Improvements in or relating to a method of and apparatus suitable for use in measuring any change in length of an optical path between a source of optical radiation and a primary image of the source

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB4310367A Expired GB1207173A (en) 1966-09-21 1967-09-21 Improvements in or relating to a method of and apparatus suitable for use in measuring any change in length of an optical path between a source of optical radiation and a primary image of the source

Country Status (8)

Country Link
BE (1) BE704089A (en)
CH (1) CH486004A (en)
DE (1) DE1572620A1 (en)
FR (1) FR92726E (en)
GB (2) GB1207174A (en)
LU (1) LU54491A1 (en)
NL (1) NL6712737A (en)
SE (1) SE329921B (en)

Also Published As

Publication number Publication date
GB1207173A (en) 1970-09-30
NL6712737A (en) 1968-03-22
SE329921B (en) 1970-10-26
FR92726E (en) 1968-12-20
DE1572620A1 (en) 1970-02-19
LU54491A1 (en) 1967-12-22
BE704089A (en) 1968-03-20
CH486004A (en) 1970-02-15

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees