【摘要】 利用传统全息的理论 ,分析了无透镜傅里叶变换数字全息记录和再现的方法及其相应的物像关系、记录系统结构参数对再现像分辨率的影响 ,并进行相应的实验验证。理论分析和实验结果都表明 :无透镜傅里叶变换全息术 ,不仅降低了数字全息对记录采样的要求 ,而且使再现像分辨率得到较大的提高。同时 ,在保证再现像分离的前提下 ,通过增大记录系统的数值孔径 (缩短记录物体到CCD和参考点源的距离 ) ,可以实现数字全息再现像分辨率的提高更多还原

【Abstract】 By using the theories of holography,the methods of recording and reconstruction and the object-image relationship in lensless Fourier digital holography are analyzed.Also,the effects of configuration parameters on the resolution of rconstruction are analyzed.The corresponding experiment is operated.The results show:lensless Fourier holography can not only reduce the sampling requirement in recording but also improve the resolution of reconstruction greatly.If the premise of separation status of the reconstructed images is satisfied,improving the resolution of construction can be achieved through enlarging the numerical aperture(shortening the distance between the object and CCD and the distance between the object and the point source of reference wave).更多还原