JPS57523A - Optical vernier type measuring instrument - Google Patents

Optical vernier type measuring instrument

Info

Publication number
JPS57523A
JPS57523A JP7483380A JP7483380A JPS57523A JP S57523 A JPS57523 A JP S57523A JP 7483380 A JP7483380 A JP 7483380A JP 7483380 A JP7483380 A JP 7483380A JP S57523 A JPS57523 A JP S57523A
Authority
JP
Japan
Prior art keywords
optical fibers
wavelengths
normal scale
pieces
scale part
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
JP7483380A
Other languages
Japanese (ja)
Inventor
Yasukazu Sano
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 JP7483380A priority Critical patent/JPS57523A/en
Publication of JPS57523A publication Critical patent/JPS57523A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical techniques

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Optical Transform (AREA)

Abstract

PURPOSE:To obtain high measurement accuracy with less number of optical fibers by providing a vernier part consisting of n+ or -1 pieces of optical fibers relatively movably to a normal scale part consisting of n pieces of regions reflecting to specific wavelengths. CONSTITUTION:The white light from a white light source 16 is allowed to arrive at an optical branching and combining device 14 as well as a branching filter 17 connected to a decoder 20, a binary coding circuit 19 and a photodetector array 18, by way of a half mirror 15. Four pieces of optical fibers disposed at constant intervals to a vernier part 12 are connected to the device 14, and a normal scale part 11 consisting of mirrors M1-Mp which reflect respectively different wavelengths lambda1- lambdap and are of the equally divided length of the length slightly different from the intervals of the optical fibers 13 is opposed to the vernier part 12. When the normal scale part 11 moves vertically, the combinations of the wavelengths reflected from the mirrors and inputting to the fibers 13 change, and said combinations correspond to the rates of displacement of the normal scale part 11; therefore, the rates of displacement are measured by detecting the combination of the wavelengths with the branching filter 17.
JP7483380A 1980-06-03 1980-06-03 Optical vernier type measuring instrument Pending JPS57523A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7483380A JPS57523A (en) 1980-06-03 1980-06-03 Optical vernier type measuring instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7483380A JPS57523A (en) 1980-06-03 1980-06-03 Optical vernier type measuring instrument

Publications (1)

Publication Number Publication Date
JPS57523A true JPS57523A (en) 1982-01-05

Family

ID=13558729

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7483380A Pending JPS57523A (en) 1980-06-03 1980-06-03 Optical vernier type measuring instrument

Country Status (1)

Country Link
JP (1) JPS57523A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01141315A (en) * 1987-11-27 1989-06-02 Agency Of Ind Science & Technol Displacement detecting device
CN111076672A (en) * 2019-12-31 2020-04-28 黑龙江科技大学 Mining hydraulic support compression amount monitoring device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01141315A (en) * 1987-11-27 1989-06-02 Agency Of Ind Science & Technol Displacement detecting device
CN111076672A (en) * 2019-12-31 2020-04-28 黑龙江科技大学 Mining hydraulic support compression amount monitoring device
CN111076672B (en) * 2019-12-31 2022-04-15 黑龙江科技大学 Mining hydraulic support compression amount monitoring device

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