CONTINUOUS OPTICAL QUALITY CONTROL MONITOR

摘要

This invention relates to an instrument for continuously measuring the gloss of thin essentially transparent plastic films as the film is in the light path of the instrument. The instrument uses a beam of visible light directed through the film in such a manner that the transmitted intensity is a measure of the gloss of the film. This device makes lengthy laboratory testing of film optical properties unnecessary because the measurement can be made as the film is being fabricated.