The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 20, 1994
Filed:
Jun. 30, 1993
Applicant:
Inventors:
Nicolas Gisin, Geneva, CH;
Patrick Stamp, Carouge, CH;
Rogerio Passy, Carouge, CH;
Nobuo Hori, Tokyo, JP;
Shigenori Nagano, Tokyo, JP;
Assignee:
Kabushiki Kaisha TOPCON, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ;
U.S. Cl.
CPC ...
356 731 ; 356128 ;
Abstract
An optical waveguide portion is provided on one surface of a substrate portion. A luminous flux for measurement is caused to be incident on one end face of the optical waveguide substrate, and only leaking light having passed through the substrate portion is received. The cross-sectional distribution of the refractive index of the optical waveguide portion is measured from changes in the received quantity of light.