| 摘要 |
This process consists in projecting, with the aid of an optical probe (2) connected to a light source (3), onto the part of the body from which the impression is to be taken, a grid of sinusoidal profile, then in repeating this projection at least twice, for a very short time, with a phase shift between two successive projections of a value equal to 2 pi /n, where n is the number of projections; in effecting an optical reading of each projected image and in transmitting it to a treatment system (4); in memorising each of these images; then in correlating them by observing the variations in the intensity resulting from the variations in the phase shift, at each point of the object, and permitting the determination by calculation of the depth of each point relative to a reference plane, the two other dimensions being defined, as a function of the optical system used, in the plane of the sensor. …<??>Application to the production of dental prostheses. …<IMAGE>… |
