Digital holography3D reconstructionAngular spectrum methodEFITamura indexSince many optical imaging systems suffer from a limited depth of focus, three-dimensional (3D) objects, or even flat objects tilted with respect to the optical axis, are imaged with only a portion of them in focus. Typically...
One can obtain images of different plane sections of a specimen in addition to its 3D display. The reconstruction of a digital hologram is based on the plane-wave expansion of the diffracted wave fields using Fourier optics (this method is also known as the angular spectrum method). With ...
However, OAM has not been implemented as an information carrier in digital holography. In conventional digital holography, the Fourier transform of a target image is convoluted with a discrete sampling array (grid of points) to create a digital hologram, but, ordinarily, the sampling array is ...
FFT Computation of spectrum diffration formular and its application in wavefront restruction of digital holography [ J ] . Act Optic Sini a , 2009, 29(5): 1163-1167. (in Chinese) 李俊昌. 角谱衍射公式的快速傅里叶变换计算及在数字全息 波面重建中的应用[J]. 光学学报, 2009, 29(5): ...
1d), the spectrum broadening about l = 0 remains symmetric. However, if the lateral motion axis v is perpendicular to the plane containing z and n, we observe an OAM spectral asymmetry that corresponds to the lateral motion direction along v, as shown in Fig. 1e for v = −...
Measurement of their topological charges via the interference method validated the availability and the accuracy of the exper⁃imental method. An optical path for vortex beam generation was designed, and a computer program was developed to create a forked grating hologram.This grating was simulated...
improved angular spectrum theoryDigital holography (DH) is a novel, real-time, non-destructive, and quantitative phase-contrast imaging method that is particularly suitable for label-free live biological cell imaging and real-time dynamic monitoring. It is currently a research hotspot in the ...
This work reports an experimental comparative study between the two most frequently used numerical reconstruction methods in digital holography; i.e. angular spectrum method (ASM) and Fresnel diffractdoi:10.1007/s12596-017-0424-zDwivedi, Gaurav
digital holographyangular spectrumphase microscopyTechniques of digital holography are improved in order to obtain high-resolution, high-fidelity images of quantitative phase-contrast microscopy. In particular, the angular spectrum method of calculating the holographic optical field is seen to have several ...
Digital holographyNumerical reconstructionFresnel diffractionAngular spectrumIn digital holography, two most frequently used numerical reconstruction methods are angular spectrum method (ASM) and Fresnel diffraction method (FDM). Both methods suffer from limitation of......