G - Physics – 03 – B
Patent
G - Physics
03
B
G03B 17/30 (2006.01) G03B 7/24 (2006.01) G03B 17/26 (2006.01) G03B 17/42 (2006.01)
Patent
CA 2086543
2086543 9202848 PCTABS00010 A radial bar code (13) providing DX film information is disposed on a disc (12) mounted at an axial end of a film cassette, the disc being rotatable with rotation of the film spool during film extraction and rewind. Film exposure status visual indicators (15, 40a-40c) are disposed on the disc and the cassette housing. A stationary optical reader (18) in the camera in association with a logic and control circuit (30) is provided to read the DX information from the rotating disc during film extraction for suitable control of exposure conditions in the camera. During film rewind the angular positioning of the disc can be measured from the bar code to cause the disc to be stopped at the end of rewind with appropriate ones of the status indicators aligned to provide a visual indication of the film exposure status to the camera user.
Cocca J. David
Smart David Clinton
Eastman Kodak Company
Gowling Lafleur Henderson Llp
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