Abstract
Recently, plant factory is promising for stable growth of high-quality agricultural products. However plant factory have a problem whose production cost is very high. In older to reduce that cost, we propose aerial light converging system of LED illuminators for improving illumination efficiency. In our system, crossed-mirror array (CMA) is used for three-dimensional in older to control light distribution. CMA is mirror optical device to form aerial LED image [1, 2]. CMA is composed of hollow apertures and each aperture performs dihedral roof mirrors. After double reflections, the incident rays are converging into the real-image position. By using this device for conversing light, lighting position will be easily designed suitable to each agricultural product.
© 2014 Japan Society of Applied Physics, Optical Society of America
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