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55 Years of Holographic Non-Destructive Testing and Experimental Stress Analysis:Is there still Progress to be expected?

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Light(Advanced Manufacturing) 2022年第1期3卷 98-113页

作者： wolfgang osten Giancarlo Pedrini Institute for Applied Optics ITO University Stuttgart Pfaffenwaldring 9 70569 StuttgartGermany

Holographic methods for non-destructive testing,shape measurement,and experimental stress analysis have shown to be versatile tools for the solution of many inspection *** main advantages are the non-contact nature,the non-destructive and areal working principle,the fast response,high sensitivity,resolution and *** contrast to conventional optical techniques such as classical interferometry,the holographic principle of wavefront storage and reconstruction makes it possible to investigate objects with rough ***,the response of various classes of products on operational or artificial load can be examined very *** paper looks back to the history of holographic metrology,honors the inventors of the main principles,discusses criteria for the selection of a proper inspection method,and shows exemplary ***,the main focus is on modern developments that are inspired by the rapid technological process in sensing technology and digitization,on current applications and future challenges.

关键词： Non-Destructive Testing Holography Stress Analysis Digital Holography Speckle Interferometry

Holographic 3D imaging through random media: methodologies and challenges

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Light(Advanced Manufacturing) 2022年第2期3卷 123-135页

作者： Mitsuo Takeda wolfgang osten Eriko Watanabe Center for Optical Research and Education Utsunomiya University7-1-2YotoUtsunomiyaTochigi321-8585Japan Institut für Technische Optik Universität StuttgartPfaffenwaldring 970569 StuttgartGermany The University of Electro-Communications 1-5-1ChofugaokaChofuTokyo 182-8585Japan

Imaging through random media continues to be a challenging problem of crucial importance in a wide range of fields of science and technology,ranging from telescopic imaging through atmospheric turbulence in astronomy to microscopic imaging through scattering tissues in *** meet the scope of this anniversary issue in holography,this review places a special focus on holographic techniques and their unique functionality,which play a pivotal role in imaging through random *** review comprises two *** first part is intended to be a mini tutorial in which we first identify the true nature of the problems encountered in imaging through random *** then explain through a methodological analysis how unique functions of holography can be exploited to provide practical solutions to *** second part introduces specific examples of experimental implementations for different principles of holographic techniques,along with their performance results,which were taken from some of our recent work.

关键词： Holography Imaging Scattering Random Media Statistical Optics Coherence Speckles Correlation Digital Holography

Phase imaging with an untrained neural network

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Light(Science & Applications) 2020年第1期9卷 1258-1264页

作者： Fei Wang Yaoming Bian Haichao Wang Meng Lyu Giancarlo Pedrini wolfgang osten George Barbastathis Guohai Situ Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences201800 ShanghaiChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences100049 BeijingChina Institut für Technische Optik Universität StuttgartPfaffenwaldring 970569 StuttgartGermany Department of Mechanical Engineering Massachusetts Institute of TechnologyCambridgeMA 02139-4301USA Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences310024 HangzhouChina

Most of the neural networks proposed so far for computational imaging(CI)in optics employ a supervised training strategy,and thus need a large training set to optimize their weights and *** aside the requirements of environmental and system stability during many hours of data acquisition,in many practical applications,it is unlikely to be possible to obtain sufficient numbers of ground-truth images for ***,we propose to overcome this limitation by incorporating into a conventional deep neural network a complete physical model that represents the process of image *** most significant advantage of the resulting physics-enhanced deep neural network(PhysenNet)is that it can be used without training beforehand,thus eliminating the need for tens of thousands of labeled *** take single-beam phase imaging as an example for *** experimentally show that one needs only to feed PhysenNet a single diffraction pattern of a phase object,and it can automatically optimize the network and eventually produce the object phase through the interplay between the neural network and the physical *** opens up a new paradigm of neural network design,in which the concept of incorporating a physical model into a neural network can be generalized to solve many other CI problems.

关键词： neural network eventually

Resolution enhancement in digital holographic microscopy with structured illumination

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Chinese Optics Letters 2013年第9期11卷 28-32页

作者：马骏袁操今司徒国海 Giancarlo Pedrini wolfgang osten School of Electronic and Optical Engineering Nanjing University of Science and Technology Department of Physics Nanjing Normal University Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Institut fr Technische Optik Universitt StuttgartPfafenwaldring 9

We present a digital holographic microscope wherein the sample is illuminated by structured light to enable the capture of additional object spatial frequencies. Reconstructed images with increased spatial resolution are obtained by separating and synthesizing bandwidths of different frequency regions in the Fourier domain. The theoretical analysis and experimental results are presented.

关键词： Optics Physics

Contributions of holography to the advancement of interferometric measurements of surface topography

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Light(Advanced Manufacturing) 2022年第2期3卷 80-99页

作者： Peter J.de Groot Leslie L.Deck Rong Su wolfgang osten Zygo Corporation MiddlefieldCT USA Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghaiChina University of Stuttgart StuttgartGermany

Two major fields of study in optics—holography and interferometry—have developed at times independently and at other times *** two methods share the principle of holistically recording as an intensity pattern the magnitude and phase distribution of a light wave,but they can differ significantly in how these recordings are formed and *** we review seven specific developments,ranging from data acquisition to fundamental imaging theory in three dimensions,that illustrate the synergistic developments of holography and interferometry.A clear trend emerges,of increasing reliance of these two fields on a common trajectory of enhancements and improvements.

关键词： holography topography interferometry metrology

2nd Preface from the Chief Editors and Publisher

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Light(Advanced Manufacturing) 2020年第1期1卷 1-2页

作者： wolfgang osten Jianlin Cao Yuhong Bai 28865 Lilienthal GermanyProfessor of Film OpticsState Key Laboratory of Applied OpticsCIOMPDong Nanhu Road 3888Changchun130033China Ministry of Science and Technology Professor of Film OpticsState Key Laboratory of Applied OpticsCIOMPDong Nanhu Road 3888Changchun130033China Light Publishing Group CIOMPDong Nanhu Road 3888Changchun130033China

Recently,the whole world was talking about the origins and consequences of climate change and how we can protect our planet from global warming and its related negative ***,another reality seems to have pushed this important discussion into the background:the COVID-19 *** epidemic has now created one of the worst crises mankind has faced in modern *** addition to extreme social consequences such as overcrowded intensive care units in hospitals,an increasing number of deaths related to the virus,travel bans for entire countries,and closed schools and universities,the negative effects on the global economy can only be guessed at the ***,the voices of industrial managers and politicians across the globe who are demanding the reduction of international climate agreement goals in the interest of faster economic recovery after the pandemic are getting *** hard-fought negotiation resulting in the Green Deal is obviously being challenged now.

关键词： consequences planet travel

Editorial Foreword-Light:Advanced Manufacturing

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Light(Advanced Manufacturing) 2020年第1期1卷 5-7页

作者： Jianlin Cao wolfgang osten Lianshan Yan Xinhua Wu Ministry of Science and Technology Professor of Film OpticsState Key Laboratory of Applied OpticsCIOMPDong Nanhu Road 3888Changchun130033China. 228865 Lilienthal Germany Center for Information Photonics&Communications School of Information Science&TechnologySouthwest Jiaotong UniversityChengduSichuan611756China. Department of Materials Science and Engineering Monash UniversityClaytonVIC 3800Australia

Light:Advanced Manufacturing(LAM),a journal affiliated to Light:Science&Applications(Light)Group,has finally come into realization after two years′*** manufacturing is a comprehensive discipline which has its root in traditional manufacturing,but applies to industrial manufacturing and engineering all the latest advancements of other sciences and technologies(especially information,communication,computer,sensing,artificial intelligence and management science).Thirty years after its establishment,the discipline is focused on the direction of pushing manufacturing to be more precise,more network-based,more integrated,more intelligent,more flexible,more personalised,more energy-efficient and *** the 21st century,advanced manufacturing is even more integrated with the development and application of the Internet,big data,and artificial intelligence,and considered as a priority for development in many countries.

关键词： artificial journal realization

Exploiting scattering media for exploring 3D objects

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Light(Science & Applications) 2016年第1期5卷 202-208页

作者： Alok Kumar Singh Dinesh N Naik Giancarlo Pedrini Mitsuo Takeda wolfgang osten Institut für Technische Optik(ITO)and Stuttgart Research Center of Photonic Engineering(SCoPE) University of StuttgartPfaffenwaldring 970569 StuttgartGermany School of Physics University of HyderabadHyderabad 500046India Center for Optical Research and Education(CORE) Utsunomiya UniversityYoto 7-1-2UtsunomiyaTochigi321-8585Japan

Scattering media,such as diffused glass and biological tissue,are usually treated as obstacles in *** cope with the random phase introduced by a turbid medium,most existing imaging techniques recourse to either phase compensation by optical means or phase recovery using iterative algorithms,and their applications are often limited to two-dimensional *** contrast,we utilize the scattering medium as an unconventional imaging lens and exploit its lens-like properties for lensless threedimensional(3D)imaging with diffraction-limited *** spatially incoherent lensless imaging technique is simple and capable of variable focusing with adjustable depths of focus that enables depth sensing of 3D objects that are concealed by the diffusing ***-field imaging with diffraction-limited resolution is verified experimentally by a single-shot recording of the 1951 USAF resolution test chart,and 3D imaging and depth sensing are demonstrated by shifting focus over axially separated objects.

关键词： intensity correlation technique lensless imaging scattering media 3D imaging

A deformation and 3D-shape measurement system based on phase-shifting digital holography

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A deformation and 3D-shape measurement system based on phase...