Device (10) for non-contact measurement, comprising: a light source (18), a light pattern projector (17) comprising a diffractive optical element (173) optically coupled to the light source, an imaging system (16) configured for imaging a target site (8) illuminated by the light pattern projector, a support (15) to which the light pattern projector and the imaging system are attached in fixed relative positions, and a processing unit (12) configured to process data acquired by the imaging system. The light source is operable to emit a plurality of light beams of different colours, each one of the plurality of light beams being a coherent beam, wherein the diffractive optical element is configured to diffract the plurality of light beams according to separate patterns.
