Control device for vibration free displacement of an optical element in a star - interferometer and star - interferometer, such a comprising.

摘要

A carriage 1 is displaced along a track 4 and carries, by a flexible link 7, a frame 6 on which is fixed to a useful load 2 comprising an optical element, a linear actuator 8 controlling the connection 7 so as to correct the imperfections of the displacement of the load 2. An accelerometer piezo electric - 21 delivers a signal 22 filtered in order to control the linear actuator 8 so as to eliminate the effect of vibrations of the carriage 1 on the load 2. There are two slaving loops which are independent for the control of the carriage, on the one hand, and for the control of the chassis of the other hand. / p & & p & application to the control of the mobile part of an optical delay line 11, or of a telescope, of a stellar interferometer.