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:
Nov. 16, 1982
Filed:
Apr. 29, 1980
Applicant:
Inventors:
Joseph L Horner, Cambridge, MA (US);
Jacques E Ludman, Westford, MA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; H04B / ;
U.S. Cl.
CPC ...
350-37 ; 370-3 ;
Abstract
A multiplexer/demultiplexer having a holographic element made using a single exposure of a photosensitive medium incorporated therein. In operation as a demultiplexer a single signal having a plurality of wavelengths impinges upon the holographic element in an appropriate manner and is separated into a plurality of signals, each being of a different one of the wavelengths. In the multiplexing mode of operation, a plurality of signals, each being of a different wavelength impinges upon the holographic element in an appropriate manner and emerges therefrom as a single signal having all of said different wavelengths.