Proceedings PaperImage hologram as visual light guide
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A durable and practical architectural installation of an image hologram that can be used to modify the direction of light from a natural or incandescent source. Working from a silver halide master prepared by the author, transfers were made by The Polaroid Corporation to their photopolymer recording material. The H2 was then applied to tempered glass using an index matching material. The glass panels are typical of those used in aluminum mullioned entries in contemporary building. The reference and read out angles of the hologram were arranged in such a way as to advantageously modify the output of the metal halide light sources used to illuminate the space. Solar tracking specular metal strips maintain reference angle during daylight at a constant input. The holograms appear as thin strips of transparent material applied to glass until the visual field is entered, then a bright and wide field image is viewed. The hologram serves to redirect approximately forty percent of the light falling on its surface deeper into the building.