【摘要】 在分析相干光照明下无衍射成像系统理论的基础上,设计了无衍射光成像系统的点扩散函数的测量系统。利用菲涅耳衍射理论,推导出相干光照明下无衍射系统的点扩散函数(PSF)的形式,并分析出点扩散函数的条纹疏密与锥镜的夹角和点光源的位置有关。实验和仿真结果表明,点扩散函数的条纹间距随锥镜夹角增大而变窄,随点光源距透镜距离的增大而变窄。更多还原

【Abstract】 Based on the theories of non-diffracting imaging system in coherent light,the measurement system of point spread function（PSF） of non-diffracting imaging system has been presented.The form of the PSF has been deduced according to the Fresnel diffraction,and it has been analyzed that the frings density of the PSF depends on the axicon’s refracting angle θ and the distance l between the point light source to lens L₂.Experimental results and simulations show that the fringe spacing of the PSF is narrow down with the increasing of θ and l.更多还原