MULTI-SPECTRAL DEVICE

The present invention concerns a multi-spectral device (10), comprising:- an imaging component (2), arranged to image at least a part of the full spectral light-field emitted by at least one object point of an object and for setting an input signal comprising a range of incidence angles on an optical filter (3);- said optical filter (3), having a transmission function depending on the incidence angle and of the wavelength of the full spectral light field, so as to transform said input signal into an output signal comprising a spectral distribution associated to an angular distribution; said optical filter being a coded optical filter (3), so that said spectral distribution and/or said angular distribution depend(s) on a spatial location on said coded optical filter (3);- a spacer (4) between said coded optical filter (4) and an image plane, arranged to transform said spectral distribution of the output signal into a spatial distribution on an image plane.This multi-spectral device is adapted to be integrated in a small, compact and/or handheld (mobile) device, as a smartphone and also to deliver high resolution images.The invention concerns also an imaging system (100) which is a compact twin camera device. The invention concerns also a system for identifying an object, classifying an object and/or detecting at least a property of an object, based on data collected by the multi-spectral device. The system allows an information retrieval in real-time on the limited computational resources of a mobile device, by using a machine-learning module. La présente invention concerne un dispositif multi-spectral (10), comprenant : - un composant d'imagerie (2), agencé pour imager au moins une partie du champ de lumière spectrale complet émis par au moins un point d'objet d'un objet et pour régler un signal d'entrée comprenant une plage d'angles d'incidence sur un filtre optique (3) ; - ledit filtre optique (3), ayant une fonction de transmission dépendant de l'angle d'incidence et de la longueur d'onde du champ de lumière spectrale complet, de façon à transformer ledit signal d'entrée en un signal de sortie comprenant une distribution spectrale associée à une distribution angulaire ; ledit filtre optique étant un filtre optique codé (3), de sorte que ladite distribution spectrale et/ou ladite distribution angulaire dépendent d'un emplacement spatial sur ledit filtre optique codé (3) ; - un espaceur (4) entre ledit filtre optique codé (4) et un plan d'image, agencé po