A Successive Approach for Designing Faceted Reflector.

Abstract

The luminance distribution of surfaces plays an important role to perceive the closed space correctly and to ensure a visual comfort. Therefore, the luminance arrangement of the interior surfaces must always be harmonious with the architectural design of interior. The necessary luminance arrangement of the interior surfaces, however, can be set by control of illuminance distribution on these surfaces. To control the illuminance level and distribution, the choice of lamp and the reflector design should be carried out according to the properties of plane/surface that will be illuminated, such as distance and dimension. In other words, the light of a lamp should be redirected to control the illumination on a plane with a “certain distance and dimension”. Faceted reflector is a kind of reflector used to control the illuminance distribution. The traditional approach for designing a faceted reflector is to radiate the light reflected from each reflector element into the angle with the same magnitude. In this study, a successive approach which is useful in the design of faceted reflector is proposed. Geometric constructions of faceted reflectors have been examined by the aim of redirecting the reflected light from each facet of reflector on a plane in a certain distance and dimension. To evaluate different approaches, examples of reflectors are designed according to both traditional and proposed approach and the simulation results of some of the properties of these reflectors are compared. Also, according to the proposed approach, application examples for various conditions are formed and the results are examined.