28-03-2013 дата публикации
Номер: US20130076857A1
A laser beam is reflected by a light beam scanning device and irradiated onto a hologram recording medium. On the hologram recording medium, an image of a linear scatter body is recorded as a hologram by using reference light that converges on a scanning origin. The light beam scanning device bends the laser beam at the scanning origin and irradiates the laser beam onto the hologram recording medium. At this time, by changing a bending mode of the laser beam with time, an irradiation position of the bent laser beam on the hologram recording medium is changed with time. Diffracted light from the hologram recording medium produces a reproduction image of the linear scatter body on a light receiving surface of the stage. When an object is placed on the light receiving surface, a line pattern is projected by hologram reproduction light, so that the projected image is captured and a three-dimensional shape of the object is measured. 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:{'b': 100', '110, 'an illumination unit (, ) that projects the line pattern (U) of light onto the object (M);'}{'b': '200', 'a pattern scanning mechanism () that changes a projection position of the line pattern (U) on the object (M) with time; and'}{'b': 300', '301', '303, 'an imaging unit (, to ) 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'}{'b': 100', '110, 'the illumination unit (, ) includes'}{'b': 50', '50, 'a coherent light source () that generates a coherent light beam (L),'}{'b': 45', '46', '85', '35', '30, 'a hologram recording medium (, , ) on which an image () of a scatter body () having a shape corresponding to the line pattern (U) is recorded, and'}{'b': 60', '65', '60', '65', '45', '46', '85', '60', '65', '45', '46', '85, 'a light beam scanning device (, ) ...
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