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:
Feb. 15, 2005
Filed:
Feb. 19, 2003
Hironori Sasaki, Yamanashi, JP;
Yutaka Okabe, Tokyo, JP;
Hironori Sasaki, Yamanashi, JP;
Yutaka Okabe, Tokyo, JP;
Oki Electric Industry Co., LTD, Tokyo, JP;
Abstract
An optical demultiplexer/multiplexer for wavelength division multiplex communication includes: a light irradiating unit for irradiating a spherical wave containing light waves of different wavelengths; optical fibers for respectively receiving the different wavelengths of the demultiplexed light wave; a converting lens for receiving the spherical wave and converting the spherical wave into a parallel wave; WDM filters each for selecting and reflecting the light wave in the parallel wave and transmitting the residual light waves; guide lenses for receiving the light waves reflected by the WDM filters, converging, and transmitting the light waves to the optical fibers; and reflecting mirrors for receiving the light waves and reflecting the light waves toward the WDM filters. The parallel wave advances from the converting lens, is selected and reflected by the WDM filter, reflected, returned to the WDM filter, selected and reflected again, converged by the guide lens, and demultiplexed by the optical fiber every wavelength.