| 摘要 |
The invention relates to a method and optical device for measuring the rotation (20) of an object (2), comprising a light source (4) capable of emitting a collimated incident light beam (8), a reflecting plane optical interface (13, 23) intended to be fastened to the object (2), the rotation of which it is desired to measure, and capable of forming a first reflected beam (15). The device of the invention is characterized in that it includes a corner reflector (12) fastened to the object (2), said corner reflector (12) having reflecting plane faces (14, 14', 14") capable of forming a second reflected beam (16), a detection system (17) capable of measuring, on the one hand, the displacement A1 of the first reflected beam (15), the one reflected by the reflecting plane optical interface (13, 23), and, on the other hand, the displacement A2 of the second reflected beam (16), the one reflected by the reflecting faces (14,14',14") of the corner reflector (12). A processing system calculates, as a function, on the one hand, of the measurement of the displacement A1 and of the distance D1 between the detection system (17) and the reflecting plane optical interface (13, 23) and, on the other hand, of the measurement of the displacement A2 and of the distance D2 between the detection system (17) and the corner reflector (12), a measurement of the rotation a of the object (2) between an initial position and a measurement position. |
