Photographic film having multiple ASA and associated camera

Details Photographic film having multiple ASA and associated camera Photographic film having multiple ASA and associated camera

1998-03-03

1999-07-06

Adams, Russell

Photography

Exposure data from film itself

430501, G03B 4100, G03C 300

Patent

active

059207361

ABSTRACT:
Photographic film including a flexible substrate sheet divided on one side into a multiplicity of different picture areas provided with respective layers of photosensitive chemical material having a plurality of different photosensitivities. Thus, each sheet or strip of film is essentially multiple ASA film. Such a film strip is provided with detectible code on a substrate sheet for encoding the photosensitivities of the different picture areas in a readable format. A camera utilizing the film is provided with a magnetic reader for determining film speeds or photosensitivities of the different picture areas on the film. A film transport mechanism is controlled by a microprocessor to move an unexposed picture area of an appropriate ASA to an exposure zone of the camera, either in response to a manually selected ASA or an automatic determination of optimal film speed in accordance with lighting conditions as detected by a light sensor, subject distance, etc. The microprocessor includes a memory for storing in encoded form which picture areas of the film have been exposed.

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patent: 5046833 (1991-09-01), Tsuchida
patent: 5210557 (1993-05-01), Kameyama et al.
patent: 5222025 (1993-06-01), Taylor, II

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