JPS57141604A - Optical fiber - Google Patents

Optical fiber

Info

Publication number
JPS57141604A
JPS57141604A JP56027225A JP2722581A JPS57141604A JP S57141604 A JPS57141604 A JP S57141604A JP 56027225 A JP56027225 A JP 56027225A JP 2722581 A JP2722581 A JP 2722581A JP S57141604 A JPS57141604 A JP S57141604A
Authority
JP
Japan
Prior art keywords
optical fiber
light
light absorbing
absorbing part
bent
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
JP56027225A
Other languages
Japanese (ja)
Inventor
Yoshikazu Yokomizo
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP56027225A priority Critical patent/JPS57141604A/en
Publication of JPS57141604A publication Critical patent/JPS57141604A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/264—Optical coupling means with optical elements between opposed fibre ends which perform a function other than beam splitting
    • G02B6/266—Optical coupling means with optical elements between opposed fibre ends which perform a function other than beam splitting the optical element being an attenuator

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

PURPOSE:To use an optical fiber for an optical switch, etc., by varying the quantity of light transferred when the optical fiber is bent, by providing the internal wall part of the optical fiber at a prescribed part with the property of absorbing or scattering light. CONSTITUTION:The internal wall of an optical fiber is provided with a light absorbing part 3 or light scattering part at a prescribed position. When light passes through the optical fiber, a beam like a beam 4 parallel to the internal wall is all transmitted before the optical fiber is bent, a beam 5 incident at some angle is absorbed by the light absorbing part 3, and a beam 6 incident at a small angle is transmitted while avoiding the light absorbing part 3. When the circumference of the light absorbing part 3 is bent, the light beams 4, 5 and 6 are all absorbed by the light absorbing part 3 and not transmitted. For this light absorbing part 3, a mixture of a material having optical refractivity close to that of a core part 1 and light absorbing pigment is used. Measuring the attenuation of light by using this optical fiber enables the measurement of the curvature, etc., of a rail.
JP56027225A 1981-02-25 1981-02-25 Optical fiber Pending JPS57141604A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56027225A JPS57141604A (en) 1981-02-25 1981-02-25 Optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56027225A JPS57141604A (en) 1981-02-25 1981-02-25 Optical fiber

Publications (1)

Publication Number Publication Date
JPS57141604A true JPS57141604A (en) 1982-09-02

Family

ID=12215143

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56027225A Pending JPS57141604A (en) 1981-02-25 1981-02-25 Optical fiber

Country Status (1)

Country Link
JP (1) JPS57141604A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60131503A (en) * 1983-12-20 1985-07-13 Tech Res & Dev Inst Of Japan Def Agency Optical attenuating method using optical fiber
JP2003065733A (en) * 2001-08-28 2003-03-05 Pentax Corp Flexible endoscopic device
JP2003075133A (en) * 2001-08-31 2003-03-12 Pentax Corp Flexible endoscope device
KR100475484B1 (en) * 1997-04-14 2005-07-01 박병림 Refractive angle measuring sensors and measuring devices and methods of measuring refractive angle
JP2007248213A (en) * 2006-03-15 2007-09-27 Fujikura Ltd Curvature sensor
JP2008190910A (en) * 2007-02-01 2008-08-21 Nagoya Institute Of Technology Bending degree detection device and bending degree detecting method using it
JP2013156026A (en) * 2012-01-26 2013-08-15 Olympus Corp Fiber sensor
WO2013118553A1 (en) 2012-02-10 2013-08-15 オリンパス株式会社 Optical sensor
WO2013191215A1 (en) * 2012-06-21 2013-12-27 オリンパス株式会社 Light guide path sensor, and method for forming light guide path sensor
JP2014000313A (en) * 2012-06-20 2014-01-09 Olympus Corp Curve sensor
WO2015019752A1 (en) 2013-08-09 2015-02-12 オリンパス株式会社 Optical sensor, optical sensor system, and endoscope
US9146097B2 (en) 2011-04-05 2015-09-29 Olympus Corporation Optical bend measurement apparatus
US9366551B2 (en) 2012-01-30 2016-06-14 Olympus Corporation Optical sensor having a characteristic changing part in a characteristic light guiding member

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60131503A (en) * 1983-12-20 1985-07-13 Tech Res & Dev Inst Of Japan Def Agency Optical attenuating method using optical fiber
KR100475484B1 (en) * 1997-04-14 2005-07-01 박병림 Refractive angle measuring sensors and measuring devices and methods of measuring refractive angle
JP2003065733A (en) * 2001-08-28 2003-03-05 Pentax Corp Flexible endoscopic device
JP2003075133A (en) * 2001-08-31 2003-03-12 Pentax Corp Flexible endoscope device
JP2007248213A (en) * 2006-03-15 2007-09-27 Fujikura Ltd Curvature sensor
JP2008190910A (en) * 2007-02-01 2008-08-21 Nagoya Institute Of Technology Bending degree detection device and bending degree detecting method using it
US9146097B2 (en) 2011-04-05 2015-09-29 Olympus Corporation Optical bend measurement apparatus
US9383193B2 (en) 2011-04-05 2016-07-05 Olympus Corporation Optical bend measurement apparatus
JP2013156026A (en) * 2012-01-26 2013-08-15 Olympus Corp Fiber sensor
US9366551B2 (en) 2012-01-30 2016-06-14 Olympus Corporation Optical sensor having a characteristic changing part in a characteristic light guiding member
WO2013118553A1 (en) 2012-02-10 2013-08-15 オリンパス株式会社 Optical sensor
US9435639B2 (en) 2012-02-10 2016-09-06 Olympus Corporation Optical sensor
JP2014000313A (en) * 2012-06-20 2014-01-09 Olympus Corp Curve sensor
WO2013191215A1 (en) * 2012-06-21 2013-12-27 オリンパス株式会社 Light guide path sensor, and method for forming light guide path sensor
JP2014006062A (en) * 2012-06-21 2014-01-16 Olympus Corp Light guide sensor and method for forming the same
US9518847B2 (en) 2012-06-21 2016-12-13 Olympus Corporation Light guide sensor, and method of forming light guide sensor
WO2015019752A1 (en) 2013-08-09 2015-02-12 オリンパス株式会社 Optical sensor, optical sensor system, and endoscope

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