JPS56614A - Detecting unit for movement of object - Google Patents

Detecting unit for movement of object

Info

Publication number
JPS56614A
JPS56614A JP7525779A JP7525779A JPS56614A JP S56614 A JPS56614 A JP S56614A JP 7525779 A JP7525779 A JP 7525779A JP 7525779 A JP7525779 A JP 7525779A JP S56614 A JPS56614 A JP S56614A
Authority
JP
Japan
Prior art keywords
photodetecting
level
detecting piece
stripes
photodetector
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
JP7525779A
Other languages
Japanese (ja)
Inventor
Kazusane Morita
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP7525779A priority Critical patent/JPS56614A/en
Publication of JPS56614A publication Critical patent/JPS56614A/en
Pending legal-status Critical Current

Links

Landscapes

  • Optical Transform (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

PURPOSE: To improve measurement sensitivity and protect a photodetecting face, by enlarging the difference between the H level and the L level of the incident light quantity to the photodetector of the photodetecting system.
CONSTITUTION: Detecting piece 1 which has stripes to reflect the light from a light source or permit the light to pass through is attached to a measured object, and photodetecting part 2 is provided in paralle with these stripes, and slit plate 6 which has many parallel slits 61 of the same width and the same interval as stripes of detecting piece 1 is provided between detecting piece 1 and photodetecting part 2 orthogonally to optical axis 7 of the photodetecting element. Then, the difference between the H level and the L level of the input of amplifier 3 is enlarged in proportion to the difference of the incident light quantity to the photodetector throughout photodetecting range of the photodetector of photodetecting part 2 according to the movement relative position of detecting piece 1 for plate 6. Consequently, measurement sensitivity for the measured object can be improved through logical operation circuit 4.
COPYRIGHT: (C)1981,JPO&Japio
JP7525779A 1979-06-15 1979-06-15 Detecting unit for movement of object Pending JPS56614A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7525779A JPS56614A (en) 1979-06-15 1979-06-15 Detecting unit for movement of object

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7525779A JPS56614A (en) 1979-06-15 1979-06-15 Detecting unit for movement of object

Publications (1)

Publication Number Publication Date
JPS56614A true JPS56614A (en) 1981-01-07

Family

ID=13570977

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7525779A Pending JPS56614A (en) 1979-06-15 1979-06-15 Detecting unit for movement of object

Country Status (1)

Country Link
JP (1) JPS56614A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63113907U (en) * 1987-01-19 1988-07-22

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63113907U (en) * 1987-01-19 1988-07-22

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