A method for recording signals on, and reproducing them from, a film for signal recording and reproduction, in which after coherent light is used to produce interference bands of light in accordance with signals, the interference bands of light are recorded on the film. In reproduction, the reproduction...http://www.google.de/patents/US5101397?utm_source=gb-gplus-sharePatent US5101397 - Method for recording signals/reproducing signals on/from film
