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Author : Ulf Schnars
Publisher :
ISBN 13 : 9783662446942
Total Pages : 240 pages
Book Rating : 4.44/5 ( download)
Download or read book Digital Holography and Wavefront Sensing written by Ulf Schnars and published by . This book was released on 2014-10-31 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ulf Schnars
Publisher : Springer
ISBN 13 : 3662446936
Total Pages : 233 pages
Book Rating : 4.35/5 ( download)
Download or read book Digital Holography and Wavefront Sensing written by Ulf Schnars and published by Springer. This book was released on 2014-09-19 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: This highly practical and self-contained guidebook explains the principles and major applications of digital hologram recording and numerical reconstruction (Digital Holography). A special chapter is designated to digital holographic interferometry with applications in deformation and shape measurement and refractive index determination. Applications in imaging and microscopy are also described. Spcial techniques such as digital light-in-flight holography, holographic endoscopy, information encrypting, comparative holography, and related techniques of speckle metrology are also treated
Author : Joseph M. Geary
Publisher : SPIE Press
ISBN 13 : 9780819417015
Total Pages : 188 pages
Book Rating : 4.17/5 ( download)
Download or read book Introduction to Wavefront Sensors written by Joseph M. Geary and published by SPIE Press. This book was released on 1995 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a practical book on wavefront sensing. Emphasis is on principles and techniques, rather than detailed mathematical analysis of such systems. The goal is to provide the reader with a qualitative understanding of wavefront sensor operation.
Author : Sennan David Sulaiman
Publisher :
ISBN 13 :
Total Pages : 100 pages
Book Rating : 4.91/5 ( download)
Download or read book Predictive Dynamic Digital Holography written by Sennan David Sulaiman and published by . This book was released on 2017 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Digital holography has received recent attention for many imaging and sensing applications, including imaging through turbulent and turbid media, adaptive optics, three-dimensional projective display technology and optical tweezing. It holds several advantages over conventional imaging and wavefront sensing, chief among these being significantly fewer and simpler optical components and the retrieval of complex field. A significant obstacle for digital holography in real-time applications, such as wavefront sensing for high-energy laser systems and high-speed imaging for target tracking, is the fact that digital holography is computationally intensive; it requires iterative virtual wavefront propagation and hill-climbing algorithms to optimize sharpness criteria. This research demonstrates real-time methods for digital holography based on approaches for optimal and adaptive identification, prediction, and control of optical wavefronts. The methods presented integrate minimum-variance wavefront prediction into dynamic digital holography schemes to accelerate the wavefront correction and image sharpening algorithms. Further gains in computational efficiency are demonstrated in this work with a variant of localized sharpening in conjunction with predictive dynamic digital holography for real-time applications. This "subspace correction" method optimizes sharpness of local regions in a detector plane by parallel independent wavefront correction on reduced-dimension subspaces of the complex field in a spectral plane.
Author : Matthais Thomas Banet
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.50/5 ( download)
Download or read book Wavefront Sensing the 3D Image Reconstruction in Deep Turbulence written by Matthais Thomas Banet and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The work presented in this dissertation explores the use of several unconventional imaging and wavefront sensing modalities in the presence of distributed-volume, or "deep," atmospheric turbulence. This dissertation focuses on the propagation of coherent light from laser sources through the atmosphere, and imaging/wavefront sensing at optical and infrared laser wavelengths. Such wavelengths are negatively affected by deep turbulence. We use a coherent detection method known as digital holography to (1) coherently image distant objects and (2) to sense and correct for aberrations due to turbulence along the propagation path. We showed that compensated-beacon adaptive optics can be used with a digital holographic wavefront sensor or a Shack-Hartmann wavefront sensor to improve the performance of beam projection to distant objects over uncompensated beacon adaptive optics. We saw performance gains of 17% for the Shack-Hartmann wavefront sensor and 26% for the digital holographic wavefront sensor on average for several turbulence scenarios. We explored multi-wavelength 3D imaging with digital holography along with two speckle decorrelation mechanisms that degrade 3D imaging performance in a theoretical framework. Upon establishing this framework, we simulated multi-wavelength 3D imaging of distant objects through deep turbulence and reconstructed the imagery using sharpness metric maximization for 3D data. The results showed that the reconstruction process was more successful if using more corrective phase screens along the digital propagation path. Additionally we showed that sharpness metric maximization suffered in performance in the presence of scintillated illumination patterns, also known as uplink scintillation. Finally we explored motion compensated, multi-wavelength 3D imaging with digital holography and a pilot tone in theory. Our theoretical framework predicted that one would see increased noise in range images, known as range chatter, over highly-sloped object facets relative to the optical axis, and simulations bore this out explicitly. We showed that range chatter increases as a function of object facet slope, optical illumination bandwidth, optical frequency spacing, and turbulence. Going further we used sharpness metric maximization to improve the range chatter that was brought about by turbulence."--Pages xiv-xv.
Author : Anand Asundi
Publisher : John Wiley & Sons
ISBN 13 : 1119972787
Total Pages : 189 pages
Book Rating : 4.85/5 ( download)
Download or read book Digital Holography for MEMS and Microsystem Metrology written by Anand Asundi and published by John Wiley & Sons. This book was released on 2011-07-05 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: Approaching the topic of digital holography from the practical perspective of industrial inspection, Digital Holography for MEMS and Microsystem Metrology describes the process of digital holography and its growing applications for MEMS characterization, residual stress measurement, design and evaluation, and device testing and inspection. Asundi also provides a thorough theoretical grounding that enables the reader to understand basic concepts and thus identify areas where this technique can be adopted. This combination of both practical and theoretical approach will ensure the book's relevance and appeal to both researchers and engineers keen to evaluate the potential of digital holography for integration into their existing machines and processes. Addresses particle characterization where digital holography has proven capability for dynamic measurement of particles in 3D for sizing and shape characterization, with applications in microfluidics as well as crystallization and aerosol detection studies. Discusses digital reflection holography, digital transmission holography, digital in-line holography, and digital holographic tomography and applications. Covers other applications including micro-optical and diffractive optical systems and the testing of these components, and bio-imaging.
Author : Ulf Schnars
Publisher : Springer Science & Business Media
ISBN 13 : 3540269118
Total Pages : 165 pages
Book Rating : 4.13/5 ( download)
Download or read book Digital Holography written by Ulf Schnars and published by Springer Science & Business Media. This book was released on 2005-12-08 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: This highly practical and self-contained guidebook explains the principles and major applications of digital hologram recording and numerical reconstruction (Digital Holography). A special chapter is designated to digital holographic interferometry with applications in deformation and shape measurement and refractive index determination. Applications in imaging and microscopy are also described. Spcial techniques such as digital light-in-flight holography, holographic endoscopy, information encrypting, comparative holography, and related techniques of speckle metrology are also treated
Author : Izabela Naydenova
Publisher : BoD – Books on Demand
ISBN 13 : 9533077298
Total Pages : 392 pages
Book Rating : 4.91/5 ( download)
Download or read book Advanced Holography written by Izabela Naydenova and published by BoD – Books on Demand. This book was released on 2011-11-09 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Holography - Metrology and Imaging covers digital holographic microscopy and interferometry, including interferometry in the infra red. Other topics include synthetic imaging, the use of reflective spatial light modulators for writing dynamic holograms and image display using holographic screens. Holography is discussed as a vehicle for artistic expression and the use of software for the acquisition of skills in optics and holography is also presented. Each chapter provides a comprehensive introduction to a specific topic, with a survey of developments to date.
Author : Emilia Mihaylova
Publisher : BoD – Books on Demand
ISBN 13 : 9535111175
Total Pages : 394 pages
Book Rating : 4.77/5 ( download)
Download or read book Holography written by Emilia Mihaylova and published by BoD – Books on Demand. This book was released on 2013-05-29 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: Holography - Basic Principles and Contemporary Applications is a collection of fifteen chapters, describing the basic principles of holography and some recent innovative developments in the field. The book is divided into three sections. The first, Understanding Holography, presents the principles of hologram recording illustrated with practical examples. A comprehensive review of diffraction in volume gratings and holograms is also presented. The second section, Contemporary Holographic Applications, is concerned with advanced applications of holography including sensors, holographic gratings, white-light viewable holographic stereograms. The third section of the book Digital Holography is devoted to digital hologram coding and digital holographic microscopy.
Author : Georges T. Nehmetallah
Publisher : SPIE-International Society for Optical Engineering
ISBN 13 : 9781628416923
Total Pages : 0 pages
Book Rating : 4.20/5 ( download)
Download or read book Analog and Digital Holography with MATLAB written by Georges T. Nehmetallah and published by SPIE-International Society for Optical Engineering. This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Holography is the only truly three-dimensional imaging method available, and MATLAB has become the programming language of choice for engineering and physics students. Whereas most books solely address the theory behind these 3D imaging techniques, this monograph concentrates on the exact code needed to perform complex mathematical and physical operations.
