JPS57128813A - Photoelectric type displacement measuring device - Google Patents

Photoelectric type displacement measuring device

Info

Publication number
JPS57128813A
JPS57128813A JP1416081A JP1416081A JPS57128813A JP S57128813 A JPS57128813 A JP S57128813A JP 1416081 A JP1416081 A JP 1416081A JP 1416081 A JP1416081 A JP 1416081A JP S57128813 A JPS57128813 A JP S57128813A
Authority
JP
Japan
Prior art keywords
light
length
scale
photodetector
disposed
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.)
Pending
Application number
JP1416081A
Other languages
Japanese (ja)
Inventor
Satoshi Omori
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.)
Mitsutoyo Manufacturing Co Ltd
Original Assignee
Mitsutoyo Manufacturing Co 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 Mitsutoyo Manufacturing Co Ltd filed Critical Mitsutoyo Manufacturing Co Ltd
Priority to JP1416081A priority Critical patent/JPS57128813A/en
Publication of JPS57128813A publication Critical patent/JPS57128813A/en
Pending 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

Abstract

PURPOSE:To improve the accuracy of measurement by making the length of the light shielding part of the scale on a light source side out of the main scale and index scale disposed between the light emitting source and a photodetector larger than the length of a light transmission part. CONSTITUTION:In a photoelectric displacement measuring machine having a light emitting source 10, a collimator lens 12, a main scale 14, an index scale 16, and a photodetector 18, the length E of the light shielding part 16b of the scale 16 disposed on the photodetector 18 side is made equal to the length D of a lght transmission part 16a, and the length C of the light shielding part 14 of the scale 14 disposed on the light source side is made larger than the length B of the light transmission part 14a. The ratio between the C and B is determined in accordance with diffusion angles theta of light. Since the irradiation of the diffused light to the photodetector 18 is prevented, the DC components of the waveforms of photodetection signals are eliminated and the accuracy of measurement is improved.
JP1416081A 1981-02-02 1981-02-02 Photoelectric type displacement measuring device Pending JPS57128813A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1416081A JPS57128813A (en) 1981-02-02 1981-02-02 Photoelectric type displacement measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1416081A JPS57128813A (en) 1981-02-02 1981-02-02 Photoelectric type displacement measuring device

Publications (1)

Publication Number Publication Date
JPS57128813A true JPS57128813A (en) 1982-08-10

Family

ID=11853393

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1416081A Pending JPS57128813A (en) 1981-02-02 1981-02-02 Photoelectric type displacement measuring device

Country Status (1)

Country Link
JP (1) JPS57128813A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5229836A (en) * 1990-10-03 1993-07-20 Canon Kabushiki Kaisha Position detecting apparatus for a moving body
JP2013140138A (en) * 2011-12-30 2013-07-18 Quanta Storage Inc Light grating structure for force feedback device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5229836A (en) * 1990-10-03 1993-07-20 Canon Kabushiki Kaisha Position detecting apparatus for a moving body
JP2013140138A (en) * 2011-12-30 2013-07-18 Quanta Storage Inc Light grating structure for force feedback device

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