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:
Jun. 09, 2015
Filed:
Sep. 15, 2011
Grégory Vincent, Massy, FR;
Riad Haidar, Paris, FR;
Stéphane Collin, Paris, FR;
Jean-luc Pelouard, Paris, FR;
Grégory Vincent, Massy, FR;
Riad Haidar, Paris, FR;
Stéphane Collin, Paris, FR;
Jean-Luc Pelouard, Paris, FR;
Centre Nationale de la Recherche Scientifique-CNRS, Paris, FR;
Office National d'Etudes et de Recherches Aérospatiales-ONERA, Chatillon, FR;
Abstract
According to one aspect, the invention relates a spectral band-pass filter, which is optimized for the transmission of an incident wave at at least a first given central wavelength λ, and which includes: a metal grating having a thickness (t) greater than approximately λ/50 and including at least a first set of substantially identical, parallel slots having a width (W) less than around λ/10, and being spaced apart periodically or quasi-periodically according to a first period that is less than said first central wavelength, a layer of dielectric material having a thickness (h) and a given refractive index (n), which is coupled to the metal grating to form a waveguide for the waves diffracted by the grating, said first period of the grating being designed such that only orders 0 and ±1 of a wave having normal incidence and a wavelength λare diffracted in the layer of dielectric material, the assembly of the dielectric layer and grating being suspended, during use, in a fluid having a refractive index of close to 1.