Abstract
In the development of civilization, illumination has been widely applied in human life along with increasing energy consumption year by year. Yet, since most light sources in the market are incandescent or fluorescent lamps, the needs for reduction in illumination energy due to energy shortage have enforced the development of energy efficient and environment friendly techniques. Due to the advantages in high efficiency, low power consumption, long performance life of high brightness white-light LED, applications of LED in illumination would be promising in both energy-saving and environmental protection areas. Optical design is most important in lamp design with the primary objective in candela distribution of the light sources. By obtaining the candela distribution data via luminous intensity measurements, simulations of light sources with optical analysis programs have based upon the measured data and other optical elements so that light-ray trace can be simulated. In this thesis, procedures for LED desk lamp design have been devised with first step in candela measurements of luminous intensity of the light sources. Secondly, simulation models of light sources are established into a simulation program with experimental verifications. Finally, a desk lamp is designed by using the optical analysis program so that the design could satisfy energy-saving, environment-friendly and JIS regulations.