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中文摘要：
首次提出采用发光二极管和二次光学透镜直接产生单个局域空心光束的方法．首先从几何光学角度分析发光二极管点光源结合二次光学透镜产生局域空心光束的原理，推算出所得局域空心光束长度及最大暗域半径计算公式，随后用数值计算软件Matlab，3D建模软件Soidworks及光学仿真软件Tracepro计算得出一款二次光学透镜并进行了仿真验证．同时计算了可能获得的局域空心光束的最小尺寸和囚禁粒子的散射力．结果显示：该透镜能够产生单个局域空心光束，所得局域空心光束的长度及最大暗域半径都在误差允许范围内与理论计算符合．研究成果为采用发光二极管光源产生局域空心光束提供一种现实可行低成本的有效方法．
英文摘要：
A new method for generating a single bottle beam directly by light emitting diode （LED） with a secondary optical lens is proposed for the first time, so far as we know. Firstly, in the aspect of geometrical optics, we analyze the principle of generation of a single bottle beam by the LED spot light with a secondary optical lens. Then, we calculate the expression of the length and the radius of the biggest dark region of the bottle beam. After that, a new type of a secondary optical lens is calculated numerically and simulated by numerical recipes software Matlab, three-dimensional modeling software Solidworks and optical simulation software Tracepro. Meanwhile, the minimum size of the bottle beam and the scattering force for trapping particles are calculated. The result shows that the designed secondary optical lens can produce a single bottle beam, the length and the radius of the biggest dark region of the generated bottle beam are in accordance with the theoretical calculations. This result offers a practical and availab!e method for generating a bottle beam with light emitting diode at a low cost.
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