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US 7,254,324 B2Granted
Systems and methods for film processing quality control
AssigneeUjwal Narayan Nirgudkar
InventorUjwal Narayan Nirgudkar
Life of this patent
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Abstract
A photographic film with a row of sprocket holes formed along each edge thereof includes one or more sensitometric step wedges of different light intensity values exposed adjacent one of the rows of sprocket holes on the photosensitive emulsion surface of the film. The light intensity values from one or more of the weges are sensed, and a film process may be adjusted in accordance with the sensed values.
Claims5
A method, comprising:
- selecting a photographic film comprising a length of film with a row of sprocket holes formed along each edge thereof, a photosensitive emulsion disposed on a surface of the film to provide a light exposure area between the two rows of sprocket holes for forming photographic images, and one or more sensitometric step wedges of different light intensity values exposed adjacent one of the rows of sprocket holes and separate from the light exposure area on the photosensitive emulsion surface of the film;
- and
- sensing light density values of at least one of the one or more step wedges.
Dependencies are inferred from the claim text.