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:
Oct. 05, 2010
Filed:
May. 30, 2008
Applicants:
Kenji Kobayashi, Yokohama, JP;
Toshiki Nishizawa, Yokohama, JP;
Yuji Mitsuhashi, Yokohama, JP;
Inventors:
Assignee:
NTT Electronics Corporation, Kanagawa, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/10 (2006.01); G02B 6/32 (2006.01); H04J 14/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A wavelength-selective switch with a switch unit having a lens array, a first lens and a beam expander, and a branching unit having a second lens, a diffraction grating, a third lens and a mirror, in which the switch unit and the branching unit are accommodated in independent casings, and a confocal point of the light transmitted through the first lens and the light transmitted through the second lens are arranged on a connecting surface of the casing of the switch unit and the casing of the branching unit.