Journal ArticleDOI
Controlling image size as a function of distance and wavelength in Fresnel-transform reconstruction of digital holograms
Pietro Ferraro,Sergio De Nicola,Giuseppe Coppola,Andrea Finizio,Domenico Alfieri,Giovanni Pierattini +5 more
Reads0
Chats0
TLDR
A method for controlling the size of amplitude and phase images reconstructed from digital holograms by the Fresnel-transform method is proposed and demonstrated and solves the problem of superimposition in multiwavelength digital holography for color display and holographic interferometry applications.Abstract:
A method for controlling the size of amplitude and phase images reconstructed from digital holograms by the Fresnel-transform method is proposed and demonstrated. The method can provide a constant reconstruction pixel width in the reconstructed image plane, independent of the recording and reconstruction distance. The proposed method makes it possible to maintain the size of an object for a sequence of digital holograms recorded at different distances and, therefore, to subtract phase maps for an object recorded at different distances. Furthermore, the method solves the problem of superimposition in multiwavelength digital holography for color display and holographic interferometry applications.read more
Citations
More filters
Proceedings ArticleDOI
Total compensation of chromatic errors in digital color holography using a single recording
TL;DR: In this article, a robust method to compensate for the chromatic aberrations induced by the optical elements in digital color holography is proposed, which combines a zero-padding algorithm and a convolution approach with adjustable magnitude.
Book ChapterDOI
Pulsed Full-Color Digital Holography with a Raman Shifter
TL;DR: Almoro et al. as mentioned in this paper used the hydrogen Raman shifter as a pulsed color holographic light source to control the chromatic dispersion of full-color holograms.
Journal ArticleDOI
Holo-graphics: A Framework for Synthesizing Hologram of Complex Object Scene
TL;DR: The idea is to explore a method whereby traditional computer graphic techniques can be applied in synthesizing holograms of complicated object scenes by reducing the heavy computation that is required to generate a hologram directly from a three dimensional (3-D) image.
Proceedings ArticleDOI
Cooperative Motion Generation Using Nonlinear Model Predictive Control for Heterogeneous Agents in Warehouse
TL;DR: In this article , the authors proposed a model predictive control to generate cooperative motion of heterogeneous agents which operate in a limited area such as warehouses, considering optimization of entire performance of the area and collision avoidance constraints.
Proceedings ArticleDOI
Three-dimensional visualization and recognition of biological microorganisms by use of partially temporal incoherent light in-line digital holographic microscopy
Inkyu Moon,Bahram Javidi +1 more
TL;DR: The methods and optical systems which aim at real time identification of micro/nano biological organisms using three-dimensional images reconstructed from partially temporal incoherent light in-line digital holograms are overview.
References
More filters
Journal ArticleDOI
Digital recording and numerical reconstruction of holograms
Ulf Schnars,Werner Jüptner +1 more
TL;DR: The principles and major applications of digital recording and numerical reconstruction of holograms (digital holography) are described, which are applied to measure shape and surface deformation of opaque bodies and refractive index fields within transparent media.
Journal ArticleDOI
Phase imaging without 2π ambiguity by multiwavelength digital holography
TL;DR: A phase-imaging method with an axial range that can in principle be arbitrarily large compared to the wavelength and does not involve the usual phase unwrapping by detection of phase discontinuity is presented.
Journal ArticleDOI
Phase-shifting color digital holography.
TL;DR: Compared the images reconstructed by two algorithms using a single Fourier transformation and a convolution with each other by both experiments and numerical simulations have proved not to cause serious deterioration of the reconstructed images.
Journal ArticleDOI
Digital holographic microscope with automatic focus tracking by detecting sample displacement in real time
TL;DR: A new method for focus tracking during the recording of a sequence of digital holograms while the sample experiences axial displacement is proposed and can be applied as a quasi-real-time procedure.
Journal ArticleDOI
Comparative digital holography
TL;DR: A method for direct holographic comparison of the shape or the deformation of two objects when it is not necessary that both samples be located at the same place is described.
Related Papers (5)
Direct recording of holograms by a CCD target and numerical reconstruction.
Ulf Schnars,W. Jüptner +1 more