Inventors:
Nicole Sullivan - Elgin IL, US
Curtis Steward - Sandwich IL, US
Rick Pecore - Manitowoc WI, US
James Borowski - Appleton WI, US
James Olejniczak - Appleton WI, US
John Masters - Tully NY, US
Assignee:
DENTSPLY RESEARCH & DEVELOPMENT CORP. - Los Angeles CA
International Classification:
G01J 5/02
G01J 5/00
Abstract:
A light control system and method for a film viewer (). The viewer () includes an infrared emitter () with an infrared detector () in communication with a microprocessor (). When a radiograph () is inserted within the film viewer (), the radiograph () is interposed between the emitter () and detector (). The microprocessor () detects a change in the emissions sensed by the detector () and illuminates the viewer (). The invention also provides a film holder () that includes a plurality of rollers () interposed between the holder () and the screen ().
