Light-fastness and weathering-fastness testing apparatus

摘要

In a weathering-fastness testing apparatus, in which the samples are arranged on the inner face (3) of a cylinder shell, the radiation intensity of a centrally arranged bar-shaped radiation source (2) is to be distributed uniformly over the entire plane of the sample. In the middle region of the longitudinal axis (5) of the bar-shaped radiation force (2) the radiation intensity is greater than in the two edge zones (6, 7). By inserting reflector elements (4'') in the path of rays between radiation source (2) and sample surface, a uniform light distribution is to be achieved on the surface (3) along the longitudinal axis (5) of the radiation source (2). IMAGE