Reconstruction of near-field in-line hologram

Yang, Shaoguang; Xie, Xingshu; Zhao, Yongfei; Jia, Chengzhi

doi:10.1016/s0030-4018(98)00346-0

Cited by 8 publications

(7 citation statements)

References 7 publications

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“…• improvements in the experimental techniques and reconstruction algorithm [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50], • applications in deformation analysis and shape measurement [51-55, 71, 111], • the development of phase-shifting digital holography [56][57][58][59][60][61][62][63][64], • applications in imaging, particle tracking and microscopy [65-70, 73, 104], • measurement of refractive index distributions within transparent media [72,74,75], • applications in encrypting information [76,77], • the development of digital light-in-flight holography [78][79][80][81][82][83], • the development of comparative digital holography [84].…”

Section: Introductionmentioning

confidence: 99%

Digital recording and numerical reconstruction of holograms

Schnars¹,

Jüptner

2002

Meas. Sci. Technol.

1,072

506

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This article describes the principles and major applications of digital recording and numerical reconstruction of holograms (digital holography). Digital holography became feasible since charged coupled devices (CCDs) with suitable numbers and sizes of pixels and computers with sufficient speed became available. The Fresnel or Fourier holograms are recorded directly by the CCD and stored digitally. No film material involving wet-chemical or other processing is necessary. The reconstruction of the wavefield, which is done optically by illumination of a hologram, is performed by numerical methods. The numerical reconstruction process is based on the Fresnel-Kirchhoff integral, which describes the diffraction of the reconstructing wave at the micro-structure of the hologram. In the numerical reconstruction process not only the intensity, but also the phase distribution of the stored wavefield can be computed from the digital hologram. This offers new possibilities for a variety of applications. Digital holography is applied to measure shape and surface deformation of opaque bodies and refractive index fields within transparent media. Further applications are imaging and microscopy, where it is advantageous to refocus the area under investigation by numerical methods.

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Section: Introductionmentioning

confidence: 99%

Digital recording and numerical reconstruction of holograms

Schnars¹,

Jüptner

2002

Meas. Sci. Technol.

1,072

506

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“…We give here the series expansion used in [8] as it will provide a direct connection with iterative approaches. It is based on the classical expansion 1/(…”

Section: Fourier-quotient Methodmentioning

confidence: 99%

“…The twin-image is then pushed back at twice its original distance and its amplitude reduced accordingly. This approach has been followed by authors using one [6,8] or two [9,10,11] holograms.…”

Section: Classes Of Existing Approachesmentioning

confidence: 99%

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Numerical suppression of the twin image in in-line holography of a volume of micro-objects

Denis

Fournier

Fournel

et al. 2008

Meas. Sci. Technol.

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Abstract. We address the twin-image problem that arises in holography due to the lack of phase information in intensity measurements. This problem is of great importance in in-line holography where spatial elimination of the twin-image cannot be carried out as in off-axis holography.A unifying description of existing digital suppression methods is given in the light of deconvolution techniques. Holograms of objects spread in 3D cannot be processed through available approaches. We suggest an iterative algorithm and demonstrate its efficacy on both simulated and real data. This method is suitable to enhance the reconstructed images from a digital hologram of small objects.

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“…Digital holography is a key component of next-generation three-dimensional (3D) camera and imaging technology. Traditional digital holography employs the two-beamline interferometric system based on signal and reference arms from a highly coherent laser source [ 1 , 2 , 3 , 4 , 5 , 6 ]. However, coherent digital holography has limitations for many practical 3D applications because it cannot take 3D-scene holograms under daylight or incoherent illumination, such as that produced by light-emitting-diodes (LEDs).…”

Section: Introductionmentioning

confidence: 99%

Digital Incoherent Compressive Holography Using a Geometric Phase Metalens

Lee

Kim

Choi

et al. 2021

Sensors

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We propose a compressive self-interference incoherent digital holography (SIDH) with a geometric phase metalens for section-wise holographic object reconstruction. We specify the details of the SIDH with a geometric phase metalens design that covers the visible wavelength band, analyze a spatial distortion problem in the SIDH and address a process of a compressive holographic section-wise reconstruction with analytic spatial calibration. The metalens allows us to realize a compressive SIDH system in the visible wavelength band using an image sensor with relatively low bandwidth. The operation of the proposed compressive SIDH is verified through numerical simulations.

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Reconstruction of near-field in-line hologram

Cited by 8 publications

References 7 publications

Digital recording and numerical reconstruction of holograms

Digital recording and numerical reconstruction of holograms

Numerical suppression of the twin image in in-line holography of a volume of micro-objects

Digital Incoherent Compressive Holography Using a Geometric Phase Metalens

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