The invention relates to an optical system (1) for the acquisition of information about a surface (4), comprising: a plenoptic lighting device (20) designed to illuminate the surface to be acquired (4); an imaging device (30) designed to acquire an image of the surface to be acquired (4); a matrix mask (7) comprising a matrix (71) of cells that can be controlled independently of each other in order to transmit a selected quantity of light; and a control device (9) designed to limit the quantity of light transmitted by a cell (71) when the light transmitted through said cell (71) generates, following reflection on the surface to be acquired (4), a specular reflection in the field angle of the imaging device (30).
