Confocal chromatic device for measuring an object , comprising: - at least one chromatic lens assembly with an extended axial chromatism; - at least one broadband light source ; - at least one optical detection means ; characterized in that : (i) it comprises a plurality of measurement channels each comprising a planar Y-junction made with a planar waveguide optics technology, and arranged for transferring illuminating light from said at least one light source towards said at least one chromatic lens assembly and the object , and for transferring measurement light reflected back by said object at a measurement point through said at least one chromatic lens assembly towards said at least one optical detection means , (ii) said planar Y-junctions comprise a first waveguide which is enlarged progressively in a tapered zone ending in two branching waveguides , said planar Y-junctions being achromatic at least over a spectral range of interest of said light source , and (iii) it comprises an integrated optics component holding the planar Y-junctions and the waveguides of said measurement channels , wherein said measurement channels each comprise a collection aperture from which said illumination light is issued and which collects the measurement light in a confocal configuration, said collection aperture being conjugate of the measurement point for the chromatic lens assembly , said collection apertures being done directly by an end of the waveguides at an edge of the integrated optics component, and facing the chromatic lens assembly so that the spatial repartition of said collection apertures determines a spatial repartition of the measurement points on the object . - at least one chromatic lens assembly with an extended axial chromatism; - at least one broadband light source ; - at least one optical detection means ; (i) it comprises a plurality of measurement channels each comprising a planar Y-junction made with a planar waveguide optics technology, and arranged for transferring illuminating light from said at least one light source towards said at least one chromatic lens assembly and the object , and for transferring measurement light reflected back by said object at a measurement point through said at least one chromatic lens assembly towards said at least one optical detection means , (ii) said planar Y-junctions comprise a first waveguide which is enlarged progressively in a tapered zone ending in two branching waveguides , said planar Y-junctions being achromatic at least over a spectral range of interest of said light source , and (iii) it comprises an integrated optics component holding the planar Y-junctions and the waveguides of said measurement channels , wherein said measurement channels each comprise a collection aperture from which said illumination light is issued and which collects the measurement light in a confocal configuration, said collection aperture being conjugate of the measurement point for the chromatic lens assembly , said collection apertures being done directly by an end of the waveguides at an edge of the integrated optics component, and facing the chromatic lens assembly so that the spatial repartition of said collection apertures determines a spatial repartition of the measurement points on the object . <EOS>