G - Physics – 01 – B
Patent
G - Physics
01
B
G01B 11/25 (2006.01) A61B 6/14 (2006.01) G01B 11/245 (2006.01)
Patent
CA 2640819
A device for tomographic scanning objects, preferably dental teeth, said device comprising the following: a source of light (1) generating a light beam (15) for irradiating the object (14); a first grid (3) arranged in the optical axis of the light beam (15) downstream of the source of light (1) through which the light beam (15) is guided before irradiating the object (14) so that a pattern of the first grid (3) is projected on the object (14); an optical imaging assembly (5, 6, 7, 9, 10) for imaging the object (14) on a sensor (13); and a second grid (12) provided in the optical axis of the reflected light beam (15) having a pattern matching the first grid (3), through said second grid (12) the reflected light beam (16) having the pattern of the first grid (3) being guided so that the sensor (13) senses the light beam (16) reflected by the object (14) with a Moiré pattern resulting from overlying the pattern of the first grid (3) and the pattern of the second grid (12). The device comprises furthermore a means (4) for moving the first grid (3) and/or the second grid (12), the motional frequency causing fluctuations in the intensity of the resulting Moiré pattern, as well as means for detecting fluctuations in intensity.
Cassan Maclean
Mht Optic Research Ag
Nectar Imaging S.r.l.
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