Abstract:
Optical device comprising: a spatial filter means (FS) for eliminating, from the light rays emanating from an observed scene (1) those coming from a direction or restricted range of directions in space, while letting through most of the light rays coming from said scene; means (21) for varying the direction or the restricted range of directions in space in correspondence with which the spatial filter means (FS) eliminates said light rays; a spectral dispersion means (26) for imparting to the light rays coming from said spatial filter means (FS) a deviation that is dependent on their wavelength; and an image detector (28) for recording the light rays dispersed by said spectral dispersion means (26), each point on said image detector (28) receiving light rays coming from said scene (1) and having a different wavelength depending on the direction in space from which they come.