Apparatus for measuring cross-sectional distribution of refracti

Details Apparatus for measuring cross-sectional distribution of refracti Apparatus for measuring cross-sectional distribution of refracti

1992-04-07

1994-01-11

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

356128, G01N 2141, G01N 2143

Patent

active

052786285

ABSTRACT:
According to the present invention, there are provided a projection system having an optical axis inclined toward one end surface of an optical waveguide portion arranged on one side of a substrate portion and for irradiating luminous flux for measurement from one end surface of the optical waveguide portion, and a light receiving unit for receiving luminous flux leaking from the optical waveguide portion among the luminous fluxes for measurement, projected light is effectively utilized for measurement, whereby cross-sectional distribution of refractive index of the optical waveguide is measured by change of light quantity entering said light receiving unit in case an incident point of the luminous flux is moved.

REFERENCES:
patent: 4468118 (1984-08-01), Bice

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