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The purpose of Natural Light Illumination System (NLIS) is to provide people a comfort and health indoor illumination by directing sunlight into indoor from the light collector. The NLIS is composed of three sub-systems, light collection, light transmission and light emission. Although we can use the high efficiency light pipe to transmit the light in the NLIS. However, once the light transmission...
This paper presents a coupler which increases the efficiency for the NLIS (Natural light illumination system). The NLIS is a novel illumination system that can provide the eco-friendly illumination for the smart building for protecting the global environment.
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...
This study presents an innovative freeform lens 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. The freeform lens is based on microlens array to collimate the light from the collecting sub-system before entering the light transmitting...
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...
This paper describes a module of the static concentrators which combine the static concentrator with solar panel. In the module, the solar panel is used to capture the sunlight from the bottom of the static concentrator, and we use Zigbee to detect the light collecting efficiency of the static concentrator, if we detect the light collection efficiency is low, the Zigbee will turn on the lamp of indoor...
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