CHEN En-guo,HUANG Jia-min,GUO Tai-liang,WU Reng-mao.A laser beam shaper for homogeneous rectangular illumination based on freeform micro lens array[J].Optoelectronics Letters,2016,12(4):253-256 A laser beam shaper for homogeneous rectangular illumination based on freeform micro lens array Author Name Affiliation CHEN En-guo  National and Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou 350002, China Postdoctoral Research Station of Electronic Science and Technology, Fuzhou University, Fuzhou 350002, China  HUANG Jia-min  National and Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou 350002, China  GUO Tai-liang  National and Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou 350002, China Postdoctoral Research Station of Electronic Science and Technology, Fuzhou University, Fuzhou 350002, China  WU Reng-mao  3D Visualization and Imaging System Lab, College of Optical Sciences, University of Arizona, Arizona 85721, USA  Abstract:       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. Hits: 3838 Download times: 0 View Full Text    Download reader