mikroschwaerzungsmessverfahren and mikroschwaerzungsmesser or. Micro densitometer

摘要

This disclosure describes a microdensitometer having an optical system which collects transmitted light without imaging the sample being analyzed. The sample under analysis is illuminated by an unresolved focused image of the scanning aperture (e.g.: slit or hole) and approximately all of the transmitted light is collected for analysis. This microdensitometer responds linearly to irradiance transmissivity without dependence on the spatial coherence of the illumination. A coherent light source is also illustrated.