Zhang Xin-Ting, Guo Cheng-Shan
Appl Opt. 2015 Jan 1;54(1):A32-8. doi: 10.1364/AO.54.000A32.
A common-path and on-axis configuration for improving the resolution power of a lensless Fresnel holographic imaging system is proposed. In this configuration, a pinhole array plate (PAP) is inserted between the object and the recording plane. We demonstrated that the complex amplitude of the object wave can be directly extracted from a single Fresnel hologram of the object wave sampled by the PAP, and the numerical aperture of the effective imaging system can be increased because of the diffraction effect of the pinhole array. It may provide one approach for improving the capabilities of digital holography available for a wide range of wavelengths from far-infrared to x-ray and electron beams.
提出了一种用于提高无透镜菲涅耳全息成像系统分辨率的共光路和同轴配置。在这种配置中，在物体和记录平面之间插入一个针孔阵列板（PAP）。我们证明，可以从由PAP采样的物体波的单个菲涅耳全息图中直接提取物体波的复振幅，并且由于针孔阵列的衍射效应，有效成像系统的数值孔径可以增加。它可能为提高适用于从远红外到X射线和电子束的广泛波长范围的数字全息术的能力提供一种方法。
