Abstract
Different with the fact that the traditional imaging optics emphasizes its ability to get clear image on the image plane, the purpose of LED illumination design is to meet the requirement of high availability of optical energy and homogeneity of illumination. As the study object, the LED track lighting has been designed with secondary optical design by the Lighttools design software. After using TIR lens which has two ways of concentrating: reflectors and lenses, the exit light of the spotlight will be adjusted and the illuminated surface will be with high homogeneity. Therefore, it will reduce the harm of the light to human’s eyes. In this study, the LED spotlights have been produced and tested with the corresponding test results: Lighting power is 7W, luminous efficiency is 82.57lm/W, color rendering index is 83.7, the main wavelength is 488.2nm, the ratio of red, green, blue is 13.1: 83.0: 3.9.
Highlights
The implementation of the “Ten cities, ten thousand lights” project in China and the LED lighting demonstration project for Beijing Olympics and Shanghai World Expo greatly enhanced the development speed of the LED lighting
LED has already entered the field of lighting, the problem of secondary light distribution restricts its further development
The development of advanced lighting design software and the appearance of free surface optical components, making the research works of improving secondary light distribution and the efficiency of LED lighting are more and more convenient
Summary
The implementation of the “Ten cities, ten thousand lights” project in China and the LED lighting demonstration project for Beijing Olympics and Shanghai World Expo greatly enhanced the development speed of the LED lighting. LED has already entered the field of lighting, the problem of secondary light distribution restricts its further development. The development of advanced lighting design software and the appearance of free surface optical components, making the research works of improving secondary light distribution and the efficiency of LED lighting are more and more convenient. The research works have done on the secondary light distribution design of the LED sources at home and abroad. LED array illumination light source and surface light source[3,4], the research on LED lamp[5], the secondary light distribution design on LED spotlights are reported in the literature[6] , by adjusting each individual Fresnel lens ring with the inclination to optimize the distribution of the projected light. We manufactured the LED lamp and the photoelectric parameter test results were given in the paper
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