Camera using film with magnetic track
US5765064A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1997 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Jan 28, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2217/244
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A camera (100), suitable for using photographic film (18) with a magnetic track (33), includes a transporting mechanism (M, 22) for transporting the film along a film transport path, a magnetic head (11) positioned adjacent the film transport path so as to read information magnetically recorded on an adjacent portion of the magnetic track, signal processing circuits (12, 42) to provide a digital output signal responsive to thus read information, and a microcomputer (13) for comparing a digital output signal to predetermined threshold levels in order to determine whether or not information is recorded on the portion of the magnetic track being read by the magnetic head and for setting the threshold values. The threshold levels can be set in accordance with a level of the digital output signal when magnetically recorded information is not being read by the magnetic head, e.g., before the film is fed or during the feeding of the film before the first frame reaches the magnetic head. The camera can also include a detector (45) for detecting information (27) indicative of the type of film in the camera and the threshold levels can be set in accordance with the type of film detected by t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.