Dual-drive device for sequential scanning, and associated method

A dual-drive device for sequential scanning, comprising:

• a moving part comprising a frame and an optical instrument that is positioned on the frame and is rotatable about a first axis with respect to the frame so as to be immobilized in a plurality of successive positions about the first axis,
• a motor configured to set the moving part in rotation about the first axis in a first direction of rotation at a constant speed,
• wherein the moving part comprises a first actuator positioned on the frame mounted in series on the moving part, said first actuator comprising a first end and a second end, the first end being secured to the frame and the second end being connected to the optical instrument, said first actuator being configured to move the first end in translation relative to the second end in a plane substantially perpendicular to the first axis so as to actuate the rotation of the optical instrument about the first axis with respect to the frame in the first direction of rotation in order to pass from a first position to a successive position from the plurality of successive positions, and in a second direction of rotation, opposite to the first direction of rotation, in order to slow down or immobilize the optical instrument in the successive position.