Author:
He Xi ,Du Tuan-Jie ,Wu Feng-Tie ,
Abstract
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 available method for generating a bottle beam with light emitting diode at a low cost.
Publisher
Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences
Subject
General Physics and Astronomy
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