| Summary: | 碩士 === 國立臺灣科技大學 === 電子工程系 === 104 === While fabricating the collimator, it needs to consider the type of light sources and various working conditions. It is obviously time wasting and not efficient. Besides, for the non-symmetric light source, it is hard to collimate light by traditional optical device. Hence, in this study, we propose an innovative numerical methodology of freeform lens that can compress and collimate light for different light sources. This numerical methodology features with automatic algorithm in fabrication simulation and is structurally processed by Basic language. We simulate and analyze the collimator with optical software named FRED. The LEP is used as light source in simulation, and Tessellation method is used for designing freeform lens. Results show that the light area can be successfully compressed from 22.4 cm×22.4 cm to 1 cm×1 cm, and the light is collimated to nearly parallel. The efficiency of the collimator reaches satisfying high values of 43.07% at the exit of collimator and 42.11% at 1 km away exit of collimator. In consequence, high collimation is obtained.
For further application, the proposed numerical methodology can also be extended to other light source like NLIS designed by PSSDL. While we input proper parameters, the program will automatically fabricate collimator, which can largely save time in designing process and improve precision.
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