A laser beam shaper for homogeneous rectangular illumination based on freeform micro lens array

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• 作者：En-guo Chen 陈恩果 ; Jia-min Huang 黄佳敏 ; Tai-liang Guo 郭太良…
• 刊名：Optoelectronics Letters
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：12
• 期：4
• 页码：253-256
• 全文大小：738 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Applied Optics, Optoelectronics and Optical Devices
  Chinese Library of Science
  
• 出版者：Tianjin University of Technology, co-published with Springer-Verlag GmbH
• ISSN：1993-5013
• 卷排序：12

文摘

An effective design method of freeform micro lens array is presented for shaping varied laser beams into prescribed rectangular illumination. The variable separation mapping is applied to design concave freeform surfaces for constructing a freeform lens array. Several dedicated examples show that the designed freeform optical lens array can achieve a prescribed rectangular illumination pattern, especially without considering the initial states of incident laser beams. Both high collection efficiency and good spatial uniformity can be available simultaneously. Tolerance analysis is also performed to demonstrate that this optical device can well avoid fabricating difficulty in actual applications.This work has been supported by the National Natural Science Foundation of China (No.61405037), and the Science and Technology Project of Fujian Province (No.2015H4014).