High-Constant-Speed Rotating Mirror

J. W. Beams, E. C. Smith, J. M. Watkins

The rotating mirror is magnetically suspended in a high vacuum and spun by a rotating magnetic field. The mirror is accelerated to full speed in a way similar to that of the armature in an induction motor, but at running speed it performs as an armature of a synchronous motor. The frequency of the rotating field is determined by a piezoelectrically controlled circuit. Also it is free of hunting. The maximum rotational speed of the mirror is determined only by the strength of the mirror. Mirrors are described which rotate at 20,000 rps.

Print ISSN
Published
1952-02
Content type
Original Research
DOI
10.5594/J09460