设计了一种在非相干光源下利用轴棱锥产生的无衍射光束成像系统.基于衍射积分理论与点扩散函数推导出成像系统分辨率的表达式, 利用光学软件对无衍射光束成像系统的初始结构模型进行仿真, 并以蓝光LED作为光源, 将条纹状物体、透镜组以及轴棱锥等光学元件组合为成像系统进行实验.结果表明: 实验结果与理论分析相符, 即非相干光源无衍射Bessel光束成像系统利用无衍射光束的特性能够提高成像分辨率.

An incoherent source non-diffraction beam imaging system was designed under incoherent source by using the axicon. The formula of the resolution of the imaging system was derived based on the the diffraction integral theory and the point spread function of the system. The optical software was used to simulate the initial structure model of the non-diffraction beam imaging system. With a blue light LED as the light source, combining with the optical components such as the striped object, lens and axicon, the experimental verification was conducted. According to the experimental results, the incoherent source non-diffraction Bessel beam imaging system can enhance the image resolution by applying the non-diffraction beam properties, which is consistent with theoretical derivation.