JPS5479062A - Inspecting method of preform for optical fibers - Google Patents

Inspecting method of preform for optical fibers

Info

Publication number
JPS5479062A
JPS5479062A JP14609377A JP14609377A JPS5479062A JP S5479062 A JPS5479062 A JP S5479062A JP 14609377 A JP14609377 A JP 14609377A JP 14609377 A JP14609377 A JP 14609377A JP S5479062 A JPS5479062 A JP S5479062A
Authority
JP
Japan
Prior art keywords
preform
polarizing plate
core
residual stresses
polarized
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.)
Granted
Application number
JP14609377A
Other languages
Japanese (ja)
Other versions
JPS5637493B2 (en
Inventor
Masao Kawachi
Tadashi Miyashita
Akio Kawana
Takashi Okada
Kaname Jinguuji
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP14609377A priority Critical patent/JPS5479062A/en
Publication of JPS5479062A publication Critical patent/JPS5479062A/en
Publication of JPS5637493B2 publication Critical patent/JPS5637493B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

PURPOSE: To perform inspection nondestructively, readily and surely by optically detecting the residual stresses in a preform through polarization and measuring the refractive index differences of the clad and core.
CONSTITUTION: When a preform 1 formed by the core 1a and clad 1b in a matching oil 16 is scanned with the laser light of a laser light source 11, the radiation light is polarized by a polarizing plate 13a which constitutes crossed Nicols together with a polarizing plate 13b. When there are no residual stresses in the preform at the time of this scanning, the polarized beam is cut off by the polarizing plate 13b and when there are residual stresses, it becomes the polarized component light of different optical path length differences and the plane of plarization rotates according to the residual stresses at the time of passing through the preform 1. Then, the polarized light through the polarizing plate 13b is detected with a photo detector 12 and the refractive index differences of the core and clad parts proportional to the optical path length differences are displayed and measured as levels of waveforms and the core diameters as waveform widths on a recorder 17. Hence, the need for laborious operations, etc. is eliminated and nondestructive, sure and safe inspection may be readily performed.
COPYRIGHT: (C)1979,JPO&Japio
JP14609377A 1977-12-07 1977-12-07 Inspecting method of preform for optical fibers Granted JPS5479062A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14609377A JPS5479062A (en) 1977-12-07 1977-12-07 Inspecting method of preform for optical fibers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14609377A JPS5479062A (en) 1977-12-07 1977-12-07 Inspecting method of preform for optical fibers

Publications (2)

Publication Number Publication Date
JPS5479062A true JPS5479062A (en) 1979-06-23
JPS5637493B2 JPS5637493B2 (en) 1981-09-01

Family

ID=15399967

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14609377A Granted JPS5479062A (en) 1977-12-07 1977-12-07 Inspecting method of preform for optical fibers

Country Status (1)

Country Link
JP (1) JPS5479062A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100424476B1 (en) * 2002-07-09 2004-03-25 삼성전자주식회사 Apparatus for measuring residual stress of optical fiber preform
JP2016045070A (en) * 2014-08-22 2016-04-04 国立大学法人宇都宮大学 Transparent wavefront measuring apparatus and transparent wavefront measuring method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100424476B1 (en) * 2002-07-09 2004-03-25 삼성전자주식회사 Apparatus for measuring residual stress of optical fiber preform
JP2016045070A (en) * 2014-08-22 2016-04-04 国立大学法人宇都宮大学 Transparent wavefront measuring apparatus and transparent wavefront measuring method

Also Published As

Publication number Publication date
JPS5637493B2 (en) 1981-09-01

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