Film information exchange system using dedicated magnetic tracks on film with virtual data indentifiers
US4965627A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 14, 1989 |
| Grant date | Oct 23, 1990 |
| Priority date | — |
| Expiry date | Aug 14, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A virtually transparent magnetic layer is included as an additional layer in a color negative film. 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 on the film, each track being dedicated to the writing and reading of a predetermined set of related parameters. The photofinisher-dedicated track locations fill the exposed image area of each frame. The camera-dedicated tracks lie along the edges of the film between the film perforations, the perforations being widely spaced for this purpose. All data is recorded as individual pieces of information individually identified by virtual data identifiers so as to minimize the recording overhead of non-information-bearing data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.