Digital holographic reconstruction of a local object field using an adjustable magnification

Li, Junchang; Peng, Zu-jie; Tankam, Patrice; Song, Qing; Picart, Pascal

doi:10.1364/josaa.28.001291

Cited by 25 publications

(14 citation statements)

References 14 publications

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“…en, inverse diffraction operation is to make the digital hologram free from interference on the object plane, and then it uses the spherical wave as the reconstruction wave to irradiate, and it uses the angular spectrum diffraction method to reconstruct the high-quality digital hologram reconstruction image. is method requires four FFT calculations (FIMG4FFT method for short) [17][18][19].…”

Section: Fimg4fft Wavefront Reconstruction Methodmentioning

confidence: 99%

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Three-Dimensional Reconstruction of Mechanical Parts Based on Digital Holography

Dai

Zhu

et al. 2020

International Journal of Optics

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In reconstruction of the off-axis digital hologram of diffuse reflection objects, the position of the positive first-order image cannot be accurately obtained because of the low quality of the reconstruction image. This paper focuses on the above problem and proposes a method for marking the first-order image of the 1-FFT surface based on the fast Fourier transform (1-FFT). The parameters of angle of illumination light were investigated, and the maximum relative measurement error is 5.6% by standard objects. The multiaperture stitching technique in cylindrical coordinates is applied to digital holography technology, and the particle swarm optimization algorithm is used to transform the nonlinear equations into optimization problems to solve the splicing parameters. Finally, the 3D display of a typical rotary three-dimensional mechanical part is successfully realized with holography stitching using the above method.

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Section: Fimg4fft Wavefront Reconstruction Methodmentioning

confidence: 99%

“…In formula (17), N is the number of points in the overlapping region. When Δρ approaches the minimum value of 0, corresponding (ρ 0 , θ 0 , α.β) is the solution of the system of equation (16).…”

Section: Principle Of Particle Swarm Optimizationmentioning

confidence: 99%

Three-Dimensional Reconstruction of Mechanical Parts Based on Digital Holography

Dai

Zhu

et al. 2020

International Journal of Optics

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“…In the following subsection, we will focus on two algorithms allowing the adjustment of magnification in the reconstruction process and that are based either on the convolution [65] or the 1-FFT [66] implementation of the Fresnel transform.…”

Section: C Algorithms With Adjustable Magnificationmentioning

confidence: 99%

Off-axis digital hologram reconstruction: some practical considerations

2011

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Holographic rendering of off-axis intensity digital holograms is discussed. A review of some of the main numerical processing methods, based either on the Fourier transform interpretation of the propagation integral or on its linear system counterpart, is reported. Less common methods such as adjustable magnification reconstruction schemes and Fresnelet decomposition are presented and applied to the digital treatment of off-axis holograms. The influence of experimental parameters on the classical hologram reconstruction methods is assessed, offering guidelines for optimal image rendering regarding the hologram recording conditions

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“…Registered interference pattern created by object and reference beams is transferred to the computer and then processed. Reconstruction of images from digital holograms can be accomplished numerically [1,[4][5][6][7][8][9][10][11][12][13][14] or optically [14][15][16] . Numerical reconstruction implements methods of calculation of light field propagation from digital hologram plane to object plane.…”

Section: Introductionmentioning

confidence: 99%

“…Numerical reconstruction implements methods of calculation of light field propagation from digital hologram plane to object plane. These methods are direct calculation of Fresnel diffraction [4] , angular spectrum propagation [5] and others [6][7][8][9][10][11][12][13][14] . Most widespread method of optical reconstruction implements digital hologram imaging with spatial light modulators (SLM) and their illumination with laser radiation [14][15][16] .…”

Section: Introductionmentioning

confidence: 99%

Improvement of quality of optical reconstruction of digital Fourier holograms displayed on phase-only SLM by its digital preprocessing

et al. 2014

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Digital holography is popular tool for research and practical applications in various fields of science and technology. Most widespread method of optical reconstruction implements digital hologram display on spatial light modulators (SLM). Optical reconstruction of digital holograms is used for remote display of static and dynamic 2D and 3D scenes, in optical information processing, metrology, interferometry, microscopy, etc. Holograms recorded with digital cameras are amplitude type. Therefore quality of its optical reconstruction with phase SLM is worse compared to amplitude SLM. However application of phase SLM can provide higher diffraction efficiency. To improve quality of optical reconstruction with phase SLM, method of SLM phase modulation depth reduction at digital hologram display is proposed. To our knowledge, this method was applied only in analog holography. Also two other methods of quality improvement are considered: hologram to kinoform conversion and holograms multiplexing. Numerical experiments on modelling of digital Fourier holograms recording and their optical reconstruction by phase SLM were performed. Method of SLM phase modulation depth reduction at digital holograms display was proposed and tested. SLM phase modulation depth ranged from 0 to 2π. Quantity of hologram phase levels equal to 256 corresponds to 2π phase modulation depth. To keep SLM settings while changing phase modulation depth hologram phase distribution was renormalized instead. Dependencies of reconstruction quality on hologram phase modulation depth were obtained. Best quality is achieved at 0.27π÷0.31π phase modulation depth. To reduce speckle noise, hologram multiplexing can be applied. Modeling of multiplex holograms optical reconstruction was conducted. Speckle noise reduction was achieved. For improvement of digital hologram optical reconstruction quality and diffraction efficiency hologram to kinoform conversion can be used. Firstly numerically reconstructed image of object was obtained. Then this image was used for kinoform synthesis. Diffraction efficiency was increased by 6.4 times in comparison with hologram reconstruction.

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Digital holographic reconstruction of a local object field using an adjustable magnification

Cited by 25 publications

References 14 publications

Three-Dimensional Reconstruction of Mechanical Parts Based on Digital Holography

Three-Dimensional Reconstruction of Mechanical Parts Based on Digital Holography

Off-axis digital hologram reconstruction: some practical considerations

Improvement of quality of optical reconstruction of digital Fourier holograms displayed on phase-only SLM by its digital preprocessing

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