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GB1063060A - Apparatus for use in measuring displacements - Google Patents

Apparatus for use in measuring displacements

Info

Publication number
GB1063060A
GB1063060A GB3187964A GB3187964A GB1063060A GB 1063060 A GB1063060 A GB 1063060A GB 3187964 A GB3187964 A GB 3187964A GB 3187964 A GB3187964 A GB 3187964A GB 1063060 A GB1063060 A GB 1063060A
Authority
GB
United Kingdom
Prior art keywords
grating
plate
photo
ratio
heidenhain
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
GB3187964A
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 GB1063060A publication Critical patent/GB1063060A/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)
  • Optical Transform (AREA)

Abstract

1,063,060. Photo-electric measuring apparatus. J. HEIDENHAIN, [trading as WENCZLER & HEIDENHAIN] Aug. 5, 1964 [Aug. 5, 1963], No.31879/64. Heading G1A. Photo-electric apparatus for position determination comprises a scale consisting of an optical diffraction grating having a grating constant a, a lined plate 2 movable in accordance with the member whose position is to be determined along a line spaced ka<SP>2</SP>/# from the grating where k is a whole number and # is the spectral centre of gravity of the sensitivity of the whole photoelectric apparatus viewing the combination. In Fig. 1 a lamp 3 provides light collimated by lens 4 and directed through the grating 1 whose rulings are metal coatings on a glass carrier to the movable plate 2 which carries similar rulings. Light passing the plate 2 is directed by lens 5 on to photo-diode 8. The grating constant of the elements 1 and 2 is 10 Ám. as shown so that if the centre of gravity of the spectral sensitivity of the system from source up to and including the detector is 1À1 Ám. the elements may be separated by 90 Ám. or a multiple thereof. Best results are obtained when k is small e.g. 1. To modify the shape of the electrical signal/position curve the ratio of the absorbing and transparent zones in the gratings may be modified. As shown with a 3 Ám. /7 Ám. ratio for the scale and 5 Ám. /5 Ám. for the plate a sine squared curve is produced. The ratio of maximum to minimum values in the electrical output is not significantly reduced by this modification.
GB3187964A 1963-08-05 1964-08-05 Apparatus for use in measuring displacements Expired GB1063060A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW0035029 1963-08-05

Publications (1)

Publication Number Publication Date
GB1063060A true GB1063060A (en) 1967-03-30

Family

ID=7600771

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3187964A Expired GB1063060A (en) 1963-08-05 1964-08-05 Apparatus for use in measuring displacements

Country Status (2)

Country Link
DE (1) DE1448504A1 (en)
GB (1) GB1063060A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4519709A (en) * 1981-12-10 1985-05-28 Dr. Johannes Heidenhain Gmbh Photoelectric incremental length or angle measuring device
GB2194044A (en) * 1986-08-15 1988-02-24 Mitutoyo Mfg Co Ltd Optical type displacement detecting device
GB2216650A (en) * 1988-01-22 1989-10-11 Mitutoyo Corp Optical encoder
GB2309779A (en) * 1996-01-23 1997-08-06 Mitutoyo Corp Encoder arrangement for displacement measuring apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3229343A1 (en) * 1981-12-15 1983-07-21 Robert Bosch Gmbh, 7000 Stuttgart Sensor for relative motions

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4519709A (en) * 1981-12-10 1985-05-28 Dr. Johannes Heidenhain Gmbh Photoelectric incremental length or angle measuring device
GB2228321B (en) * 1986-08-15 1990-11-14 Mitutoyo Mfg Co Ltd Optical type replacement detecting device
US4912322A (en) * 1986-08-15 1990-03-27 Mitutoyo Mfg. Co., Ltd. Optical type displacement detecting device
GB2228320A (en) * 1986-08-15 1990-08-22 Mitutoyo Mfg Co Ltd Optical type displacement detecting device
GB2228321A (en) * 1986-08-15 1990-08-22 Mitutoyo Mfg Co Ltd Optical type displacement detecting device
GB2194044A (en) * 1986-08-15 1988-02-24 Mitutoyo Mfg Co Ltd Optical type displacement detecting device
GB2194044B (en) * 1986-08-15 1990-11-14 Mitutoyo Mfg Co Ltd Optical type displacement detecting device
GB2228320B (en) * 1986-08-15 1990-11-14 Mitutoyo Mfg Co Ltd Optical type displacement detecting device
GB2216650A (en) * 1988-01-22 1989-10-11 Mitutoyo Corp Optical encoder
GB2216650B (en) * 1988-01-22 1992-05-13 Mitutoyo Corp Optical encoder
GB2309779A (en) * 1996-01-23 1997-08-06 Mitutoyo Corp Encoder arrangement for displacement measuring apparatus
US5889280A (en) * 1996-01-23 1999-03-30 Mitutoyo Corporation Apparatus for measuring displacement
GB2309779B (en) * 1996-01-23 2000-05-17 Mitutoyo Corp Apparatus for measuring displacement

Also Published As

Publication number Publication date
DE1448504A1 (en) 1968-12-12

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