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. 24, 2017
Filed:
Nov. 27, 2013
Centre National DE LA Recherche Scientifique, Paris, FR;
Institut D'optique Graduate School, Palaiseau, FR;
Universite Paris-sud, Orsay, FR;
Philippe Ben-Abdallah, Vieille Eglise en Yvelines, FR;
Anne-Lise Coutrot, Paris, FR;
Mondher Besbes, Les Ulis, FR;
Henri Benisty, Palaiseau, FR;
Centre National De La Recherche Scientifique, Paris, FR;
Institut D'Optique Graduate School, Palaiseau, FR;
Universite Paris SUD, Orsay, FR;
Abstract
A source of directional radiation in an IR band comprises at least a substrate and an external layer comprising controllable cells made of a metal insulator transition material that changes phase depending on its temperature relative to a temperature at which the corresponding wavelength is located in the IR band and that possesses a crystalline phase and an amorphous phase, and control means for controlling the phase change of the cells so as to form in this external layer a diffraction grating when the cells are controlled to the amorphous phase, in order thus to obtain a switchable directional source.