| 摘要 |
<p>A fluorescence dot area meter (10) for accurately measuring halftone dot area on a printing plate (12) having an emulsion (14) containing one or more fluorescent compounds. The fluorescent dot area meter (10) generally includes an illumination source (16) for providing light having a first range of wavelengths (28), a system (16, 32) for exposing the printing plate (12) to this light to cause the printing plate to emit light (fluoresce) within a second, higher range of wavelengths (44) , and a system (18, 20) for determining halftone dot area based on a measurement of the light emitted by the printing plate.</p> |
