JPS57187605A - Measuring device for optical movement distance - Google Patents

Measuring device for optical movement distance

Info

Publication number
JPS57187605A
JPS57187605A JP7279281A JP7279281A JPS57187605A JP S57187605 A JPS57187605 A JP S57187605A JP 7279281 A JP7279281 A JP 7279281A JP 7279281 A JP7279281 A JP 7279281A JP S57187605 A JPS57187605 A JP S57187605A
Authority
JP
Japan
Prior art keywords
light
modulation device
laser
measured
reading
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
JP7279281A
Other languages
Japanese (ja)
Inventor
Toshio Kano
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP7279281A priority Critical patent/JPS57187605A/en
Publication of JPS57187605A publication Critical patent/JPS57187605A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

PURPOSE:To measure simply and without contact and in real time the amount of movement by reading by means of a reading light a spectrum pattern of a space modulation device that was double-exposed by the reflection light from an object to be measured and applying Fourier conversion to detect Cross-Wiener spectrum. CONSTITUTION:The light from Ar laser at a specified time is reflected at an object 6 to be measured, and it is focused on a space modulation device 9 via a focusing optical system and it is recorded. After the object 6 moves DELTAS in t1 seconds in the same way the image of reflection is recorded at the sapce modulation device 9. Next, the Ar laser 1 is shielded by a shutter 2 and the reading light from He-Ne laser 15 that is made parallel by collimater optical syatem of lenses 17 and 18 is directed to the space modulation device 9. The emitting light which has changed its polrization characteristics is Fourier-converted by a Fourier conversion lens 11 through a light detection element 10, and Cross- Wiener spectrum is detected by a photo-electric conversion device 12, and the amount DELTAS of movement of the object 6 is measured simply and in real time without contact.
JP7279281A 1981-05-14 1981-05-14 Measuring device for optical movement distance Pending JPS57187605A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7279281A JPS57187605A (en) 1981-05-14 1981-05-14 Measuring device for optical movement distance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7279281A JPS57187605A (en) 1981-05-14 1981-05-14 Measuring device for optical movement distance

Publications (1)

Publication Number Publication Date
JPS57187605A true JPS57187605A (en) 1982-11-18

Family

ID=13499590

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7279281A Pending JPS57187605A (en) 1981-05-14 1981-05-14 Measuring device for optical movement distance

Country Status (1)

Country Link
JP (1) JPS57187605A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0245704A (en) * 1988-08-05 1990-02-15 Matsushita Electric Ind Co Ltd Visual sensing device for robot
JPH0480658A (en) * 1990-07-23 1992-03-13 Hamamatsu Photonics Kk Method and apparatus for measuring velocity
US5166742A (en) * 1990-11-30 1992-11-24 Hamamatsu Photonics K.K. Optical deformation measuring apparatus by double-writing speckle images into a spatial light modulator
US5361131A (en) * 1991-08-12 1994-11-01 Hamamatsu Photonics K.K. Optical displacement measuring apparatus utilizing Fourier transform method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0245704A (en) * 1988-08-05 1990-02-15 Matsushita Electric Ind Co Ltd Visual sensing device for robot
JPH0480658A (en) * 1990-07-23 1992-03-13 Hamamatsu Photonics Kk Method and apparatus for measuring velocity
US5166742A (en) * 1990-11-30 1992-11-24 Hamamatsu Photonics K.K. Optical deformation measuring apparatus by double-writing speckle images into a spatial light modulator
US5361131A (en) * 1991-08-12 1994-11-01 Hamamatsu Photonics K.K. Optical displacement measuring apparatus utilizing Fourier transform method

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