| 新型光学元件产生无衍射线结构光 |
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| 引用本文： | 吴志伟.新型光学元件产生无衍射线结构光[J].三明学院学报,2012,29(2):65-69. |
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| 作者姓名： | 吴志伟 |
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| 作者单位： | 泉州师范学院物理与信息工程学院,福建泉州,362000 |
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| 基金项目： | 泉州师范学院科研基金(2010KJ04) |
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| 摘 要： | 提出一种可产生中心光斑较强无衍射线结构光的新型光学元件。该新型光学元件可以通过在三角棱镜底部的中间部分开一个尺寸和底角都较小的三角形截面凹槽制成,其光束变换特性可以等效为两个不同底角三角棱镜的组合,主要用于解决普通三角棱镜产生无衍射线结构光能量均匀分布,不适合直接应用于三维表面测量且中心光斑对能量利用率较低的问题。采用几何光学理论分析了产生中心光斑较强无衍射线结构光的原理,计算了中心光斑较强无衍射线结构光的相关参数。由衍射积分理论分析和模拟了新型光学元件后的光强分布特性。研究表明,平面波正入射到新型光学元件可以产生中心光斑较强无衍射线结构光。
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| 关 键 词： | 几何光学 无衍射线结构光 衍射 三角棱镜 无衍射光 |
Novel Optical Element Generating Non-Diffracting Linear Structured Beam |
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| WU Zhi-wei.Novel Optical Element Generating Non-Diffracting Linear Structured Beam[J].Journal of Sanming University,2012,29(2):65-69. |
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| Authors: | WU Zhi-wei |
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| Institution: | WU Zhi-wei (Institute of Physics and Information Engineering,Quanzhou Normal College,Quanzhou 362000,China) |
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| Abstract: | A novel optical element generating non-diffracting linear structured beam that has higher intensity in the central spot is proposed.This element is designed by grooving in the middle part of element bottom with triangular-section that its dimension and bottom corner are smaller than body.Its property is the same as the combination of two normal triangular-section prisms with different bottom corner for beam transformation.In addition,the problem that energy of non-diffracting linear structured beam generated by normal triangular-section prism is evenly distributed and unsuitable to be used to three-dimensional surface measurement directly and energy efficiency of central spot is lower is solved.The formation mechanism of the non-diffracting linear structured beam that has higher intensity in the central spot is analyzed by geometrical optics,and the relevant parameters are calculated.The intensity distribution is simulated by diffraction and interference theory.The results show that,when a plane wave illuminates on the novel optical element,non-diffracting linear structured beam that has higher intensity in the central spot is formed. |
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| Keywords: | geometrical optics non-diffracting linear structured beam diffraction and interference triangular-section prism non-diffracting beam |
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