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:
May. 28, 2002
Filed:
May. 10, 2000
Nippon Telegraph & Telephone Corporation, Tokyo, JP;
Abstract
An optical switch of the present invention has a plurality of elements arranged in each of a row and a column direction thereof, where the slits of each element are located at corresponding crossing point between an optical wave guide extending to a row direction and a column direction. A heating element, provided near each of the slits, with a predetermined resistance value, and liquid with predetermined optical characteristic which moves within the slit. The liquid is moved to switch the optical paths at the crossing point between the optical wave-guides. A first electric wirings connecting the heating element of elements in the same row direction in condition that ratio of the resistance value of each heating element to the predetermine resistance value has a predetermined value or smaller, and a second electric wiring connecting the heating element of the element in the same column direction together in condition that a ratio of the resistance value of each heating element to the predetermine resistance value has a predetermined value or smaller.