GB1389309A - Apparatus for measuring properties of movement - Google Patents

Apparatus for measuring properties of movement

Info

Publication number
GB1389309A
GB1389309A GB4033572A GB4033572A GB1389309A GB 1389309 A GB1389309 A GB 1389309A GB 4033572 A GB4033572 A GB 4033572A GB 4033572 A GB4033572 A GB 4033572A GB 1389309 A GB1389309 A GB 1389309A
Authority
GB
United Kingdom
Prior art keywords
grating
movement
pyramid
photo
dimensional
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
GB4033572A
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.)
Ernst Leitz Wetzlar GmbH
Original Assignee
Ernst Leitz Wetzlar 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
Priority claimed from DE19712144487 external-priority patent/DE2144487C3/en
Priority claimed from DE19712160877 external-priority patent/DE2160877C3/en
Application filed by Ernst Leitz Wetzlar GmbH filed Critical Ernst Leitz Wetzlar GmbH
Priority to GB2991773A priority Critical patent/GB1439002A/en
Priority to IE159673A priority patent/IE38226B1/en
Priority to NL7312445A priority patent/NL7312445A/xx
Priority to LU68397D priority patent/LU68397A1/xx
Priority to IT6970373A priority patent/IT996679B/en
Priority to FR7332664A priority patent/FR2198839A1/fr
Priority to DE19732346015 priority patent/DE2346015A1/en
Publication of GB1389309A publication Critical patent/GB1389309A/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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Optical Transform (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

1389309 Optical detection of movement ERNST LEITZ GmbH 31 Aug 1972 [6 Sept 1971 8 Dec 1971] 40335/72 Heading H4D [Also in Division G1] In a device for measuring a property of relative movement (one dimensional, Fig. 1, two dimensional, Figs. 2 and 3), between a grating or a periodic optical array and an object, a double image of the object is formed (by a Woolaston prism, the spacing between corresponding image points being equal to the grating constant in Fig. 1) on the grating and the light passing through is received by one (four, Figs. 2, 3) pair of photo-detectors positioned with respect to a polarizing splitter so that each photo-detector receives light from a different one of the images, thus when there is relative movement the photo-detectors can provide signals whose frequency is proportional to the speed and whose phase difference sign indicates the direction of movement. Fig. 3, shows part of an array formed by transparent pyramids 21, 22, 23, 24, for use in a device (Fig. 2, not shown), for investigating two dimensional motion, and depending upon which face of each pyramid the radiation is incident or the radiation may be sent in one of four different directions (only two shown in Fig. 3). The pyramid grating replaces the line grating of Fig. 1, and four pairs of photodetectors are employed in the same fashion as before. The Woolaston prism is arranged so that the direction of the splitting of corresponding image points of the images, is parallel to the bisector of the two preferred directions of the pyramid raster patterns.
GB4033572A 1971-09-06 1972-08-31 Apparatus for measuring properties of movement Expired GB1389309A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB2991773A GB1439002A (en) 1972-08-31 1973-06-22 Printing
IE159673A IE38226B1 (en) 1972-08-31 1973-09-07 Improvements in or relating to printing
NL7312445A NL7312445A (en) 1972-08-31 1973-09-10
LU68397D LU68397A1 (en) 1972-08-31 1973-09-10
IT6970373A IT996679B (en) 1972-08-31 1973-09-11 PROCEDURE AND LITHOGRAPHIC PRINTING MACHINE
FR7332664A FR2198839A1 (en) 1972-08-31 1973-09-11
DE19732346015 DE2346015A1 (en) 1972-08-31 1973-09-12 PROCEDURE FOR LITHOGRAPHIC PRINTING AND ARRANGEMENT FOR CARRYING OUT THE PROCEDURE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19712144487 DE2144487C3 (en) 1971-09-06 1971-09-06 Device for non-contact measurement
DE19712160877 DE2160877C3 (en) 1971-12-08 1971-12-08 Device for measuring the relative movement of an object

Publications (1)

Publication Number Publication Date
GB1389309A true GB1389309A (en) 1975-04-03

Family

ID=25761693

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4033572A Expired GB1389309A (en) 1971-09-06 1972-08-31 Apparatus for measuring properties of movement

Country Status (4)

Country Link
CH (1) CH548605A (en)
FR (1) FR2152122A5 (en)
GB (1) GB1389309A (en)
IT (1) IT965158B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2736583C2 (en) * 1977-08-13 1985-11-07 Ernst Leitz Wetzlar Gmbh, 6330 Wetzlar Method and device for obtaining control signals which are phase-shifted from one another for an up-down counter

Also Published As

Publication number Publication date
FR2152122A5 (en) 1973-04-20
IT965158B (en) 1974-01-31
CH548605A (en) 1974-04-30

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee