JPS5657935A - Measuring method for multiple refractive index of transparent filament - Google Patents

Measuring method for multiple refractive index of transparent filament

Info

Publication number
JPS5657935A
JPS5657935A JP13376679A JP13376679A JPS5657935A JP S5657935 A JPS5657935 A JP S5657935A JP 13376679 A JP13376679 A JP 13376679A JP 13376679 A JP13376679 A JP 13376679A JP S5657935 A JPS5657935 A JP S5657935A
Authority
JP
Japan
Prior art keywords
filament
refractive index
deltan
interference fringes
dtheta
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
JP13376679A
Other languages
Japanese (ja)
Other versions
JPS6223813B2 (en
Inventor
Jiro Shimizu
Tokumasa Okui
Go.Jiyu.Kee
Takashi Tagawa
Akira Tsuchida
Masaru Kashima
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.)
Unitika Ltd
Original Assignee
Unitika 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 Unitika Ltd filed Critical Unitika Ltd
Priority to JP13376679A priority Critical patent/JPS5657935A/en
Publication of JPS5657935A publication Critical patent/JPS5657935A/en
Publication of JPS6223813B2 publication Critical patent/JPS6223813B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/21—Polarisation-affecting properties
    • G01N21/23—Bi-refringence

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

PURPOSE:To realize a measurement of the multiple refractive index without measuring the diameter of the filament previously, by irradiating the laser beams the polarized faces of which are parallel and vertical to the filament and then observing the shift of the interference fringes. CONSTITUTION:The shift dtheta is observed between the interference fringes which are caused when the laser beam the polarized face of which is parallel to the filament 2 satisfying the conditions of DELTAn<lambda/D to the filament 2 and the interference fringes caused by irradiating the laser beam the polarized face of which is vertical to the filament 2. Thus the double refractive index DELTAn is obtained based on the fixed equation. In the above equation, lambda shows the wavelength of the beam source with D showing the diameter of the filament 2 respectively. The above-mentioned equation used e.g. DELTAn=(dtheta/2)[1+[n/(n-1)]sin(theta/2)] or DELTAn=dtheta/2, where theta shows the position of the interference fringes and n shows the refractive index of the filament 2 each.
JP13376679A 1979-10-16 1979-10-16 Measuring method for multiple refractive index of transparent filament Granted JPS5657935A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13376679A JPS5657935A (en) 1979-10-16 1979-10-16 Measuring method for multiple refractive index of transparent filament

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13376679A JPS5657935A (en) 1979-10-16 1979-10-16 Measuring method for multiple refractive index of transparent filament

Publications (2)

Publication Number Publication Date
JPS5657935A true JPS5657935A (en) 1981-05-20
JPS6223813B2 JPS6223813B2 (en) 1987-05-25

Family

ID=15112452

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13376679A Granted JPS5657935A (en) 1979-10-16 1979-10-16 Measuring method for multiple refractive index of transparent filament

Country Status (1)

Country Link
JP (1) JPS5657935A (en)

Also Published As

Publication number Publication date
JPS6223813B2 (en) 1987-05-25

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