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. 07, 2017
Filed:
Jun. 17, 2014
Centre National DE LA Recherche Scientifique, Paris, FR;
Office National D'etudes ET DE Recherches Aérospatiales, Châtillon, FR;
Emilie Sakat, Gometz-la-Ville, FR;
Riad Haïdar, Paris, FR;
Jean-Luc Pelouard, Paris, FR;
Patrick Bouchon, Verrières-le-Buisson, FR;
Grégory Vincent, Massy, FR;
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE—CNRS, Paris, FR;
Office National d'Etudes et de Recherches Aérospatiales—ONERA, Palaiseau, FR;
Abstract
According to one aspect, the invention relates to an angular optical filtering element (E) optimized for angular filtering about a given operating angle of incidence (θ) in a given spectral band. The angular filtering element (E) comprises a first nanostructured, band-pass, spectral filter (11, 301) and a second nanostructured, band-pass, spectral filter (12, 302). Each of the first and second spectral filters comprises, respectively, in said spectral band, a first and a second central filtering wavelength that respectively has a first and second angular dispersion curve defined depending on the angle of incidence (θ) on the optical filtering element (E), the curves of angular dispersion being secant about the operating angle of incidence (θ) of the optical filtering element. The invention applies to the production of a selective angular filtering device and to a multidirectional optical detection system.