1. A scanner apparatus that scans an object (M) with a line pattern (U) of light and imports surface information of the object (M), comprising: an illumination unit ( 100 , 110 ) that projects the line pattern (U) of light onto the object (M); a pattern scanning mechanism ( 200 ) that changes a projection position of the line pattern (U) on the object (M) with time; and an imaging unit ( 300 , 301 to 303 ) that captures an image of the object (M) onto which the line pattern (U) is projected from a predetermined direction, and imports surface information of the object (M), wherein the illumination unit ( 100 , 110 ) includes a coherent light source ( 50 ) that generates a coherent light beam (L 50 ), a hologram recording medium ( 45 , 46 , 85 ) on which an image ( 35 ) of a scatter body ( 30 ) having a shape corresponding to the line pattern (U) is recorded, and a light beam scanning device ( 60 , 65 ) that irradiates the light beam (L 60 , L 65 ) onto the hologram recording medium ( 45 , 46 , 85 ) and scans the light beam so that an irradiation position of the light beam (L 60 , L 65 ) on the hologram recording medium ( 45 , 46 , 85 ) changes with time, wherein an image of the scatter body ( 30 ) is recorded as a hologram on the hologram recording medium ( 45 , 46 , 85 ) by using reference light (L 23 , Lref) irradiated along an optical path, the coherent light source ( 50 ) generates a light beam (L 50 ) with a wavelength capable of reproducing the image ( 35 ) of the scatter body, the light beam scanning device ( 60 , 65 ) scans the light beam (L 60 , L 65 ) so that an irradiation direction of the light beam (L 60 , L 65 ) onto the hologram recording medium ( 45 , 46 , 85 ) is along the optical path of the reference light (L 23 , Lref), and the line pattern (U) is projected by reproduction light of a hologram obtained from the hologram recording medium ( 45 , 46 , 85 ).