Patent ID: 6374058
Filing Date: 2002-04-16
Classification: G03B,G11B

Abstract:
A magnetic regenerating unit for photographic film coated with a magnetic recording layer on which a magnetic record area for recording information for each frame is specified, said magnetic regenerating unit regenerating magnetic information from the magnetic record area while the photographic film is feeding; said magnetic regenerating unit for the camera; comprising:a magnetic head for accessing to the magnetic recording layer while the photographic film is feeding; and wherein said magnetic regenerating unit obtains a reference value from a voltage level of a regenerated signal representing an amplitude of signal voltage output from said magnetic head during regeneration of an area of said magnetic recording layer with no magnetic information located between magnetic record areas for two frames adjacent to one another on said photographic film; and said magnetic regenerating unit determines whether any magnetic information is recorded or not in a magnetic record area of each frame based on comparison between a value corresponding to an amplitude of signal voltage output from said magnetic head during regeneration of the magnetic record area of each frame and said reference value.