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This paper represents the design of a freeform reflector coupler which reduces the amount of light guides and has a high efficiency of the optical coupler used in the NLIS (Natural Light Illumination System). The NLIS is used to guide the natural light indoors for illumination, which system is implemented in energy saving smart buildings to reduce energy consumption. This optical structure has a freeform...
In developing a high-quality natural light illumination system, the primary concern is to increase system efficiencys. This paper describes a new static lighting concentrator with the optical couplers. The new coupler not only increases the efficiency but also reduces the numbers of output ports. The structure consists of two-layered units, planar light guide, and a central coupler to compress sunlight...
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