Viewing system for radiographs

摘要

A light control system and method for a film viewer ( 10 ). The viewer ( 10 ) includes an infrared emitter ( 50 ) with an infrared detector ( 52 ) in communication with a microprocessor ( 34 ). When a radiograph ( 40 ) is inserted within the film viewer ( 10 ), the radiograph ( 10 ) is interposed between the emitter ( 50 ) and detector ( 52 ). The microprocessor ( 34 ) detects a change in the emissions sensed by the detector ( 52 ) and illuminates the viewer ( 10 ). The invention also provides a film holder ( 16 ) that includes a plurality of rollers ( 60 ) interposed between the holder ( 16 ) and the screen ( 14 ).