Werner Osterhaus’s scientific contributions

The historical and cultural background in Japan and Denmark is significantly different , however, they are sharing some common points in the delicate sensitivity to the light. Both people like diffusely transmitted light than dazzling and bright light, and also like a gradation of light and shadow. To make sure preference of lampshade by Danish people, the impression evaluation experiment for Danish students using paper folding lampshade of various shapes and colors temperatures had been performed. To examine similarities and differences in Japanese and Danish impression evaluation, almost the same experiment was conducted with Japanese students.

Lampshade was developed as wind shield for light source when fire was used for light source. Though contemporary light sources, like LED lamp, fluorescent lamp and incandescent light, are working with electricity and wind shield is not required for the light sources, almost all light sources are still covered by lampshade to arrange or control luminous flux from light source. And combination of lampshades and light sources may give distinctive impression to surrounding people. Among many types of lampshade, authors paid attention to shades of surrounding type made by diffuse transmitting material without printed texture since the type is following basic role of lampshade, decreasing luminance level of light source and softening flow of light. Using white paper without printed texture, authors constructed several lampshades by paper folding technique and surrounded two types of light source with the shades for subjects experiment. And authors performed semantic differential for Danish students to evaluate how forms, bump texture and color temperature are affected on impression of the students.