Patent ID: 6208814
Filing Date: 2001-03-27
Classification: G03B

Abstract:
A pre-exposing method for performing a pre-exposure on a strip of film wound inside a cartridge, a predetermined image being photographed in a part of each frame of said photographic film by said pre-exposure, said pre-exposed photographic film being contained in a camera to photograph an image of a subject in a remaining part of said frame, said pre-exposing method comprising the steps of:advancing said photographic film from said cartridge;simultaneously pre-exposing N said frames of said strip, where N is an integer greater than 1 and less than a total number of said frames of said strip, said pre-exposing being performed by projecting light through an original image source and a lens to the strip, wherein the strip, lens, and original image source are spatially separated from one another;alternately moving the strip by N said frames relative to the original image source and repeating the pre-exposing step until all said frames of said strip have been pre-exposed, wherein each iteration of the pre-exposing step pre-exposes a different said predetermined image; andrewinding said pre-exposed photographic film into said cartridge.