Abstract: A device for non-contact measurement includes a light source and a light pattern projector having a diffractive optical element. An imaging system images a target site illuminated by the light pattern projector. The light pattern projector and the imaging system are attached to a support in fixed relative positions. The support has a longitudinal axis parallel to an optical axis of the projector, and the projector and the imaging system are spaced apart along the longitudinal axis. The light source emits a plurality of light beams of different colors, each one being a coherent beam optically coupled to the diffractive optical element. The diffractive optical element diffracts the plurality of light beams according to different diffraction angles resulting in separate patterns. The processing unit determines a measurement based on at least two positions automatically recognized in data acquired from a single one of the separate patterns.