GB955763A - Device for the determination of the relative positions of two members - Google Patents

Device for the determination of the relative positions of two members

Info

Publication number
GB955763A
GB955763A GB1850762A GB1850762A GB955763A GB 955763 A GB955763 A GB 955763A GB 1850762 A GB1850762 A GB 1850762A GB 1850762 A GB1850762 A GB 1850762A GB 955763 A GB955763 A GB 955763A
Authority
GB
United Kingdom
Prior art keywords
scale
carrier
photo
members
graduations
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
GB1850762A
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.)
Dr Johannes Heidenhain GmbH
Original Assignee
Dr Johannes Heidenhain GmbH
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 Dr Johannes Heidenhain GmbH filed Critical Dr Johannes Heidenhain GmbH
Publication of GB955763A publication Critical patent/GB955763A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • 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
    • G01D5/347—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 using displacement encoding scales
    • G01D5/34707—Scales; Discs, e.g. fixation, fabrication, compensation
    • G01D5/34715—Scale reading or illumination devices
    • 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

955, 763. Determining the relative position of members photo-electrically. J. HEIDENHAIN, [trading as WENCZLER & HEIDENHAIN]. May 14, 1962 [May 27, 1961], No.18507/62. Heading G1A. [Also in Division G4] A device for determining the relative positions of two members 1 and 2 one of which is mechanically guided relative to the other in such a manner that it has one degree of freedom, comprises a transparent scale carrier 4 with scale divisions marked thereon secured to one of the members 1, which co-operates with a surface bearing a scale 10 secured to the other member 2 the determination of the said relative positions being made with the aid of a light beam projected through the scale carrier 4 and the scale 10 wherein the surface carrying the scale 10 is mounted as to be capable of movement across the scale carrier 4 and carries distance pieces 20 in contact with and slidable on the surface of the scale carrier 4 to maintain the scale 10 at a fixed distance from the scale carrier 4 to maintain the surface bearing the scale 10 at a fixed distance from the carrier 4. In the embodiment shown light from a source 8 shines through a collimating lens 9 on to the transparent scale carrier 4 having a series of grid like parallel graduations 16 (Fig. 5) ten microns wide, and from there on to the unit 17 having two sets of parallel graduations 18, 18<SP>1</SP> on a transparent scale 10 shifted in phase relative to one another by 90 degrees. The graduations 18, 18<SP>1</SP> are aligned in front of lenses 11 and 11<SP>1</SP> respectively which cause the light to impinge on a pair of photo-electric cells 13, 13<SP>1</SP>. Any movement of the member 2 in the direction of the degree of freedom with respect to the member 1 produces a series of pulse like signals at the outputs of the photo-electric cells 13, 13<SP>1</SP>, 90 degrees out of phase due to the action of the graduations 16 and 18, 181. The scale 10 is fixed in a rectangular frame of polyfluorethylene the longitudinal edges or distance pieces 20 of which project beyond the surface and slide on the surface 15. The frame is spring loaded (Fig. 2 not shown) in such a manner that it is resiliently movable in a direction perpendicular to the surface 15. The outputs of the photo-electric cells are fed to an evaluating instrument (not shown).
GB1850762A 1961-05-27 1962-05-14 Device for the determination of the relative positions of two members Expired GB955763A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW0030066 1961-05-27

Publications (1)

Publication Number Publication Date
GB955763A true GB955763A (en) 1964-04-22

Family

ID=7599397

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1850762A Expired GB955763A (en) 1961-05-27 1962-05-14 Device for the determination of the relative positions of two members

Country Status (2)

Country Link
CH (1) CH398098A (en)
GB (1) GB955763A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3596222A (en) * 1968-10-09 1971-07-27 Olivetti & Co Spa Precision electric transducer for position measuring on machine tools
US3833303A (en) * 1972-10-06 1974-09-03 Bausch & Lomb Measuring apparatus using the moire fringe concept of measurement
IT1058791B (en) * 1976-04-08 1982-05-10 Olivetti & Co Spa PRECISION TRANSDUCER FOR LINEAR POSITION MEASUREMENTS
IT1072337B (en) * 1976-05-18 1985-04-10 Olivetti Controllo Numerico Cp PRECISION TRANSDUCER FOR POSITION MEASUREMENTS AND RELATED MANUFACTURING PROCESS
JPS5726004U (en) * 1980-07-21 1982-02-10
AT395070B (en) * 1983-11-22 1992-09-10 Emr Elektronische Mess Und Reg LENGTH MEASURING DEVICE, ESPECIALLY ENCLOSED LENGTH MEASURING DEVICE

Also Published As

Publication number Publication date
CH398098A (en) 1965-08-31

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