Optical design of an LED cyclorama light

Q4 Physics and Astronomy 光学技术 Pub Date : 2014-01-01 DOI:10.3788/GXJS20144004.0331

刘晓东 Liu Xiaodong, 李湘宁 Li Xiang-ning, 汪宇青 Wang Yuqing

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Abstract

Cyclorama light is a luminaire specialized in lighting cyclorama at a close distance.The light shall be have an asymmetric intensity distribution and cove a large angular area in order to obtain uniform illumination on a cyclorama in a specific area.Based on the geometrical optics and the theory of irradiance,the luminous intensity distribution that satisfies the uniform illumination is calculated first.The secondary optical design based on the optical properties of the LED is developed,so that emergent light intensity distribution of the LED cyclorama light can match the luminous intensity distribution curve model.According to the law of conservation of energy,the luminous intensity distribution curve is equivalently divided in a discrete manner,and then effective superposition and compensation of directive rays and reflective rays are built.The reflective surface is designed according to the said method to realize the lighting requirements.The simulation of the designed LED cyclorama light by Zemax shows that cycloramas with different sizes and structure can be illuminated uniformly at a close distance through a simple lighting superposition of several designed LED cyclorama lights.The uniformity of illumination is above 85%and the energy efficiency is above 80%.

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一种LED环形光的光学设计

环形灯是一种专门用于近距离照明环形的灯具。光线应具有不对称的强度分布，并具有较大的角面积，以便在特定区域内获得均匀的光照度。根据几何光学和辐照度理论，首先计算出满足均匀照度的光强分布。根据LED的光学特性进行二次光学设计，使LED环形光的出射光强分布符合发光强度分布曲线模型。根据能量守恒定律，对光强分布曲线进行离散等分，建立指令射线和反射射线的有效叠加和补偿。根据所述方法设计反射面以实现照明要求。利用Zemax软件对所设计的LED环形灯进行仿真，结果表明，将设计的多个LED环形灯进行简单的照明叠加，可以在近距离内均匀地照亮不同尺寸和结构的环形灯。照明均匀度在85%以上，能源效率在80%以上。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

光学技术 Physics and Astronomy-Atomic and Molecular Physics, and Optics

CiteScore

0.60

自引率

0.00%

发文量

6699

期刊介绍： The predecessor of Optical Technology was Optical Technology, which was founded in 1975. At that time, the Fifth Ministry of Machine Building entrusted the School of Optoelectronics of Beijing Institute of Technology to publish the journal, and it was officially approved by the State Administration of Press, Publication, Radio, Film and Television for external distribution. From 1975 to 1979, the magazine was named Optical Technology, a quarterly with 4 issues per year; from 1980 to the present, the magazine is named Optical Technology, a bimonthly with 6 issues per year, published on the 20th of odd months. The publication policy is: to serve the national economic construction, implement the development of the national economy, serve production and scientific research, and implement the publication policy of "letting a hundred flowers bloom and a hundred schools of thought contend".