| Summary: | 碩士 === 國立中央大學 === 光電科學與工程學系 === 106 === In this thesis, we had successfully analyzed optical performance of commercial high-power pcW-LEDs. The analysis included the étendue and exitance of the light sources, and these properties is an indicator for the application of long-distance projection. In addition, we proposed a long-distance projection lamp design with secondary optical components, as well as a proper LED light source to build up an optical module with high optical performance. Under driving power 5.2 watts, the optical module behaves long-distance project, where FWHM of divergence angle were 1.33 degrees, optical efficiency was 77 %, optical utilization factor was 45.9%, and the projection distance was 1055.5 m. Finally, after confirming the design results by experiment, a luminaire with 3×3 modules to produce a projection of distance as long as 3.1 km with driving power of 41.8 watts. The luminaire has several advantages, such as light weight, energy saving and low cost, and is expected to be used in special lighting applications such as border, marine or decoration.
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