Method and apparatus for magnetically recording information on photographic film

Abstract

A method and apparatus for recording an information on magnetic recording tracks, called camera tracks, formed on a photographic negative film while relative movement is caused between the photographic negative film and a magnetic head. When the magnetic head is located in an information recording region of the camera tracks, a signal of the information representing photographing conditions of each image frame such as the aspect ratio of each frame, exposure amount at the time of photographing, information on a light source, etc., is output to the magnetic head via a modulator and a recording current amplifier. When the magnetic head is located in an non-recording region of the camera tracks, direct current having a magnitude substantially equal to the optimal recording current of the magnetic head or alternating current having the frequency which is not less than 5 times the frequency of the signal is output to the magnetic head via the modulator and the recording current amplifier.

Dependencies are inferred from the claim text.