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:
Dec. 28, 1982
Filed:
Jan. 05, 1981
Hiroshi Terui, Mito, JP;
Morio Kobayashi, Mito, JP;
Nippon Telegraph & Telephone Public Corporation, Tokyo, JP;
Abstract
An optical switch comprising a substrate with a refractive index n.sub.1 which is transparent with respect to a guided light beam, an optical waveguide film with a refractive index n.sub.2 which is formed on the substrate, a low-refractive-index region with a refractive index n.sub.2 ' which is smaller by a predetermined value than the refractive index n.sub.2 formed at a predetermined location in the optical waveguide film, a movable dielectric chip with a refractive index n.sub.4 which is transparent with respect to the guided light beam and a relative distance of which is adjustable relative to a plane including the low-refractive-index region and a vicinal area of the optical waveguide film in the vicinity of the region, and an intermediate layer with a refractive index n.sub.3 disposed between the plane and the movable dielectric chip wherein the refractive indices n.sub.1, n.sub.2, n.sub.2 ', n.sub.3 and n.sub.4 have a relationship of n.sub.2 >n.sub.2 '>n.sub.4 >(n.sub.1, n.sub.3), and effective refractive indices of the optical waveguide film and the low-refractive-index region are varied by changing a distance between the plane and the movable dielectric chip, so that guided light beam incident to the region is deflected. With such an arrangement, a deflection angle of 20.degree. or more is obtained, so that the optical switch is suitable for the integration of the optical switch.