Generating control signals for laser show e.g. in discotheque - filtering out selected music signals in pairs as control signals for two scanners

摘要

Laser light is projected onto a screen or a smoke film by means of two scanners (6, 7). Selected music signals are filtered out as control signals for the scanners. The control signals cause an amplitude variation limit using amplitude averaging. The control signals are used in pairs. Each control signal is used to control one of the two scanners. The second control signal is phase shifted w.r.t. the first, and a flat picture is produced. USE/ADVANTAGE - Provides remote stable laser images in synchronisation with music.