Electrodynamic projector for entertainment visualization of audio signals, uses linear motors for generating oscillating rotational movements of mirrors

摘要

An electrodynamic projector has a battery-driven laser beam transmitter (1) with two flat mirrors (3) spaced plan-parallely apart by less than 10 mm. Oscillating rotational movements of the mirrors (3) are generated by the linear motors (6) at the inputs of which is the audio signal (7) of a portable playback device. The axles of rotation of the mirrors are of a ferromagnetic material and reside between the manually displaceable pole-pairs (5) of permanent magnets, whose displacement cause a change of the magnetic field and thereby influences the oscillating rotational movements. A third rotating mirror (3) has its mirror axis inclined at 45 degrees to the other mirrors. The light beam (2) of the laser beam transmitters (1) is reflected and deflected synchronously to/with the audio signal (7).