发明名称 |
Photographic film having multiple ASA and associated camera |
摘要 |
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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申请公布号 |
US5920736(A) |
申请公布日期 |
1999.07.06 |
申请号 |
US19980033884 |
申请日期 |
1998.03.03 |
申请人 |
BROGDEN, SHONA;STIRBL, ROBERT C.;WILK, PETER J. |
发明人 |
BROGDEN, SHONA;STIRBL, ROBERT C.;WILK, PETER J. |
分类号 |
G03B17/04;G03B19/04;G03B19/07;G03B35/02;G03B35/10;G03B41/00;(IPC1-7):G03B41/00;G03C3/00 |
主分类号 |
G03B17/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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