Journal ArticleDOI
Precision coordinate measurements using holographic recording
TLDR
In this article, the authors discuss the techniques of in-line and off-axis holography, and the problems that are encountered in practice, focusing on precision three-dimensional coordinate measurements from holographic images.Abstract:
Holography offers unique advantages over conventional photography or traditional photogrammetric techniques in the recording of three-dimensional objects over a large depth of field. However, there are several fundamental problems in recording and replay that must be understood and overcome. The authors discuss the techniques of in-line and off-axis holography, and the problems that are encountered in practice. They present a review of several applications in particulate recording, bubble chamber holography, fuel-rod 'hologrammetry', endoscopy etc. The emphasis is on precision three-dimensional coordinate measurements from holographic images.read more
Citations
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Journal ArticleDOI
Three-Dimensional Particle Velocimetry
TL;DR: In recent years, the problems tackled by experimentalists and theoreticians in fluid dynamics have grown considerably as discussed by the authors, and powerful computers allow modelling of very complex flow fields, such as nonstationary flows, their spatial structures and their development in time.
Journal ArticleDOI
Intrinsic speckle noise in in-line particle holography
TL;DR: A theoretical model for in-line holography of multiple particles is developed, using diffraction theory and statistical analysis, and it is shown that the virtual image of the particle ensemble is the dominant source of speckle in reconstruction and is quantified with a signal-to-noise ratio (SNR).
Journal ArticleDOI
Intrinsic aberrations due to Mie scattering in particle holography.
TL;DR: Simulations based on Mie scattering theory show that even with a perfect hologram the reconstructed particle images demonstrate complex three-dimensional morphologies and bodily shifts, and study the intrinsic aberrations in the holographic particle image introduced by particle light scattering.
Journal ArticleDOI
Four-dimensional dynamic flow measurement by holographic particle image velocimetry
TL;DR: The ultimate goal of holographic particle image velocimetry (HPIV) is to provide space- and time-resolved measurement of complex flows, and for the first time to the authors' knowledge, the goal of both temporally and spatially resolved flow measurements becomes tangible.
Journal ArticleDOI
Intrinsic speckle noise in off-axis particle holography.
TL;DR: A mathematical model that relates the first- and second-order statistical properties of the intrinsic speckle noise to relevant holographic system parameters is constructed and shows that the noise-limited information capacity can be expressed as the product of particle number density and the extent of the particle field along the optical axis.
References
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Journal ArticleDOI
Reconstructed Wavefronts and Communication Theory
Emmett N. Leith,Juris Upatnieks +1 more
TL;DR: In this paper, a two-step imaging process is described from a communication-theory viewpoint, which consists of three well-known operations: a modulation, a frequency dispersion, and a square-law detection.
Journal ArticleDOI
Wavefront Reconstruction with Diffused Illumination and Three-Dimensional Objects*
Emmett N. Leith,Juris Upatnieks +1 more
TL;DR: Three-dimensional holograms of transparencies produced in diffused light are of a quality comparable to pictures produced by conventional photography with incoherent light and have all the visual properties of the original scene.
Journal ArticleDOI
Wavefront Reconstruction with Continuous-Tone Objects*
Emmett N. Leith,Juris Upatnieks +1 more
TL;DR: In this paper, the extraneous twin image and other interfering terms have been eliminated using a two-beam interferometric technique and high quality reconstructions have been made by using a high-quality reconstructions.
Journal ArticleDOI
Magnification and Third-Order Aberrations in Holography*
TL;DR: In this article, the authors derived formulas for angular, lateral, and longitudinal magnification in reconstructed images by holography (imaging by reconstructed wavefronts) and discussed conditions under which one or more of the aberration coefficients vanish, taking into account an off-axis angle of both reference and illuminating beam.
Journal ArticleDOI
Nonparaxial Imaging, Magnification, and Aberration Properties in Holography*
TL;DR: In this paper, the imaging, magnification, and aberration properties of the images formed from holograms were extended to the non-paraxial case, which can be used to locate accurately the position of an image point in cases where the paraxial theory fails.