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上图是１９９４年安装于华盛顿特区的环境事务部总部及国家航空航天博物馆的硫灯照明系统的示意图。从硫灯发出的光线经过一个抛物面反射器聚焦后，以极小的锥角进入一个光导管。光线经过衬于一根丙烯酸外管内壁的棱柱形膜层（Ａ）反射而通过光导管。该棱柱形膜层使光线发...
Pictured above is a schematic of the sulfur lamp lighting system installed at the Department of Environmental Affairs headquarters in Washington, DC, and the National Air and Space Museum in 1994. The light from the sulfur lamp is focused by a parabolic reflector and enters a light pipe with a very small cone angle. The light is reflected by the prismatic film (A) lining the inner wall of an acrylic outer tube and passes through the light pipe. The prismatic film ...