Low Glare Illumination System

摘要

A low-glare illuminating system using fiber optics was developed for the Bureau of Mines. Fiber bundles transmit light from sources to luminaries. Light is from tungsten halogen lamps in 2 dichroic reflectors. Six lamps are housed together with a stepdown transformer in one enclosure. Three conceptual designs were made before development of the fiber optic concept. A fluorescent concept used two F8T5 lamps in a unique W shaped reflector. The reflector gave the appearance of eight lamps. An incandescent concept used a rectangular solid plastic luminaire molded with a reflector and diffuse surface. A lamp enclosure was mounted on its end. The early fiber optic concept was changed for the final development. As finally produced, the luminaire had a lower profile and a curved underside for painting as a reflector. Top surface was abraded for diffusion. The lamp enclosure at first was for a single lamp. This was changed to six lamps in one enclosure for simplified wiring. Plastic fiber optics bundles were expensive to manufacture and economical glass fiber bundles were obtained. Nonelectrical fiber bundles make the system one of minimum electrical damage vulnerability.