Multispectral Imaging Device with MOEMS Type Filter for Satellite Observation

A multispectral imaging device for satellite observation by “push-broom” scanning over an observed area, operating in N wavelength bands, respectively centered on a first wavelength (λ1), . . . , an nth wavelength (λN) comprising:

• a source emitting a light beam in a set of the N wavelength bands;
• a wide-field optic;
• a set of N rows of detectors making it possible to acquire images of said observed area;
• optical filtering means,
• characterized in that it also comprises:
• a first dispersion element (R1,R) making it possible to disperse the light beam toward the filtering means;
• optical filtering means comprising at least one micro-opto-electro-mechanical system (MOEMS) capable of carrying out N filtering functions for the N spectral bands, wavelength-tunable;
• control means for said micro-opto-electro-mechanical system making it possible to select the filtering function;
• a second dispersion element (R2) making it possible to recombine all the filtered beams at the output of the filtering means.