| 摘要 |
<p>A virtually transparent magnetic layer (120) is included as an additional layer in a color negative film (100). Information exchange between various users of the film -such as (for example) the film manufacturer, the camera user, the dealer and photofinisher- is carried via plural longitudinal magnetic tracks (20-24) (F0-F29) on the film that begin and end within individual frames. Each track is dedicated to the writing and reading of a predetermined set of parameters relating to the corresponding frame, for easy access by a particular one of the various users. Each user has the capability to read and/or write information in the corresponding tracks. The photofinisher-dedicated tracks fill each frame but avoid the film perforations, and are therefore the same for all film formats. Camera-dedicated tracks are accommodated using a special film format having only a single film perforation along one edge for each frame. The camera tracks lie outside of each frame along the imperforate film edge portions. The camera tracks are wider than the film tracks in order to accommodate film wander in the camera.</p> |
