| Summary: | 碩士 === 國立彰化師範大學 === 電機工程學系 === 97 === Since light emitting diode (LED) has the characteristic of directional property, it is not suitable to be directly applied to general lighting systems, otherwise, it will cause the phenomenon of uneven illumination. Thus, a secondary optics is required to achieve uniform illumination. In this thesis, an LED illumination module design is presented based on the concept of the candle power distribution curve. Therefore, the wanted distribution can be implemented with an appropriately designed reflector and a high-power LED so that the goal to achieve uniform illumination distribution and to conform to the CNS (National Standards of the Republic of China) standard can be obtained on the target plane. This lighting module is designed using the TracePro software, and the influence of the arrayed LED illumination modules on the whole target plane is also explored with the same software. Finally, the optimal LED illumination-module array can be determined to produce the intensity distribution conformed to the CNS standard, and hence the loss of energy can be reduced effectively. The optic simulation result shows that the optical efficiencies of the various illumination-module arrays in this the thesis can achieve 96%, and the uniformity of illumination is up to 0.7.
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