| 基于Etendue和显色特性的内窥镜LED照明系统的设计 |
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| 引用本文： | 徐佳,王蔚生,张鸣杰,邱崧. 基于Etendue和显色特性的内窥镜LED照明系统的设计[J]. 光学技术, 2008, 34(4) |
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| 作者姓名： | 徐佳 王蔚生 张鸣杰 邱崧 |
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| 作者单位： | 华东师范大学,光谱学和波谱学教育部重点实验室,上海,200062;华东师范大学物理系,上海,200062;华东师范大学物理系,上海,200062;华东师范大学,电子科学技术系,上海,200062 |
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| 摘 要： | 根据内窥镜的使用要求,以Etendue的分析为基础,提供了一种内窥镜光纤照明系统。采用多个白光LED (W-LED)作为光源,提高了光通量,并对W-LED缺陷波段进行补色,通过移动补色光中心波长位置和调节光强度,有效地提高了显色指数。采用环形光纤,改善了光场角分布和白光与青色光的混光。给出了理论分析与计算、光学系统的优化设计与仿真的结果。实验得到了远场175.421m的光能量和87.7的显色指数,完全可以满足内窥镜照明系统的使用要求。
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| 关 键 词： | 内窥镜 LED Etendue 显色指数 照明系统 |
Design of illumination system for LED endoscope based on Etendue and color-rendering properties |
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| XU Jia,WANG Wei-sheng,ZHANG Ming-jie,QIU Song. Design of illumination system for LED endoscope based on Etendue and color-rendering properties[J]. Optical Technique, 2008, 34(4) |
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| Authors: | XU Jia WANG Wei-sheng ZHANG Ming-jie QIU Song |
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| Abstract: | According to the request of endoscope in application of technology and the modem theory of Etendue,a design of lighting system research on endoscope is provided.Adopting a number of W-LED as light source,the high brightness is ob- tained.To improve the color-rendering index of light,a Cyan-LED is a necessary complement to W-LED of some wavelengths lost by moving the center wavelength of complemented light and adjusting the light intensity.A loop-shaped fiber is used for im- proving normalized angular intensity distribution of power and mixture of W-LED and Cyan-LED in illuminated region.The principle and design method are analyzed.The optimized result of emulation and test of prototype is described.It shows that 175.42 lm of luminous flux and 87.7 of color-rendering are sufficient for the illumination light of endoscope in application. |
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| Keywords: | applied optics Etendue color-rendering index illumination system optical-design |
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