摘要
提出一种可产生中心光斑较强的无衍射线结构光的新型光学元件——变折射率三角棱镜。变折射率三角棱镜的折射率分布呈阶跃式变化,可以用于解决折射率均匀三角棱镜产生的无衍射线结构光能量均匀分布、中心光斑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的无衍射线结构光的原理,计算了中心光斑较强的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,平面波正面入射新型光学元件可以产生中心光斑较强的无衍射线结构光。
A novel optical element,step refractive index triangular prism,for generating non-diffracting linear structural beam which has higher intensity in the central spot is proposed.The problem that the energy of non-diffracting linear structural beam generated by uniform refractive index triangular prism is evenly distributed and the energy efficiency of central spot is low is solved.The formation mechanism of the non-diffracting linear structural beam which has higher intensity in the central spot is analyzed by geometric optics,and the relevant parameters are also calculated.The intensity distribution is simulated by diffraction integral theory.The results show that when a plane wave illuminates the novel optical element,a non-diffracting linear structural beam which has higher intensity in the central spot is formed.
出处
《激光与光电子学进展》
CSCD
北大核心
2012年第4期129-133,共5页
Laser & Optoelectronics Progress
关键词
光学器件
线结构光
变折射率
三角棱镜
无衍射光
衍射积分
几何光学
optical devices
linear structural beam
step refractive index
triangular prism
non-diffracting beam
diffraction integral
geometric optics
