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| 1 | Solving the inverse grating problem by white light interference Fourier scatterometry显示文摘Scatterometry is a well-established,fast and precise optical metrology method used for the characterization of sub-lambda periodic features.The Fourier scatterometry method,by analyzing the Fourier plane,makes it possible to collect the angle-resolved diffraction spectrum without any mechanical scanning.To improve the depth sensitivity of this method,we combine it with white light interferometry.We show the exemplary application of the method on a silicon line grating.To characterize the sub-lambda features of the grating structures,we apply a model-based reconstruction approach by comparing simulated and measured spectra.All simulations are based on the rigorous coupled-wave analysis method. | Valeriano Ferreras Paz Sandy Peterhansel Karsten Frenner Wolfgang Osten | 2012 | Light(Science & Applications)2012，1，1： | 8 |
| 2 | Phase imaging with an untrained neural network显示文摘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 biases.Setting 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 training.Here,we propose to overcome this limitation by incorporating into a conventional deep neural network a complete physical model that represents the process of image formation.The 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 data.We take single-beam phase imaging as an example for demonstration.We 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 model.This 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. | Fei Wang Yaoming Bian Haichao Wang Meng Lyu Giancarlo Pedrini Wolfgang Osten George Barbastathis Guohai Situ | 2020 | Light(Science & Applications)2020，9，1： | 3 |
| 3 | Lensless light-field imaging through diffuser encoding显示文摘Microlens array-based light-field imaging has been one of the most commonly used and effective technologies to record high-dimensional optical signals for developing various potential high-performance applications in many fields.However,the use of a microlens array generally suffers from an intrinsic trade-off between the spatial and angular resolutions.In this paper,we concentrate on exploiting a diffuser to explore a novel modality for light-field imaging.We demonstrate that the diffuser can efficiently angularly couple incident light rays into a detected image without needing any lens.To characterize and analyse this phenomenon,we establish a diffuser-encoding light-field transmission model,in which four-dimensional light fields are mapped into two-dimensional images via a transmission matrix describing the light propagation through the diffuser.Correspondingly,a calibration strategy is designed to flexibly determine the transmission matrix,so that light rays can be computationally decoupled from a detected image with adjustable spatio-angular resolutions,which are unshackled from the resolution limitation of the sensor.The proof-of-concept approach indicates the possibility of using scattering media for lensless four-dimensional light-field recording and processing,not just for two-or three-dimensional imaging. | Zewei Cai Jiawei Chen Giancarlo Pedrini Wolfgang Osten Xiaoli Liu Xiang Peng | 2020 | Light(Science & Applications)2020，9，1： | 2 |
| 4 | On-line surveillance of a dynamic process by a moving system based on pulsed digital holographic interferometry 显示文摘 | Giancarlo Pedrini Igor Alexeenko Wolfgang Osten | 2006 | Appl 0pt2006，45，： | 1 |
| 5 | Measurement of Displacement Vector Fields of Extended Objects显示文摘 | Osten W Juptner W | 1996 | Optics and Lasers in Engineering1996，24，： | 1 |
| 6 | Typology of sentence negation显示文摘 | Dahl Osten | 1979 | Linguistics1979，，17： | 1 |
| 7 | Perturbation methods in optics: application to the interferometric measurement of surfaces 显示文摘 | E Garbusi W Osten | 2009 | J Opt Soc Am A2009，26，12： | 1 |
| 8 | The determination of material parameters of microcomponents using digital holography显示文摘 | Seebacher S Osten W Baumbach T Juptner W | 2001 | Optics and Lasers in Engineering2001，36，： | 1 |
| 9 | Interferometer for Precise and flexible asphere testing显示文摘 | GARBUSI E PRUSS C OSTEN W | 2008 | optics Letters2008，33，24： | 1 |
| 10 | Spiral phase filtering and orientation-selective edge detection/enhance- ment 显示文摘 | Guohai Situ Giancarlo Pedrini Wolfgang Osten | 2009 | J Opt Soc Am A2009，26，8： | 1 |
| 11 | Direct shape measurement by digital wavefront reconstruction and muhiwavelength contouring显示文摘 | Christophe Wagner Wolfgang Osten Soenke Seebaeher | 2000 | Opt Eng2000，39，1： | 1 |
| 12 | Noise-free normalized fringe patterns and local pixel transforms for strain extraction 显示文摘 | Yu Q F Andresen K Osten W | 1996 | Appl Opt1996，35，20： | 1 |
| 13 | Exciton-phonon coupling in indirect gap AgBr nanocrystals显示文摘 | Vogelsang H Stolz H Osten W V | 1996 | J Lumin1996，70，16： | 1 |
| 14 | Reconstruction algo- rithm for high-numerical-aperture holograms with dif- fraction- limited resolution 显示文摘 | Zhang F Pedurini G Osten W | 2006 | Opt Lett2006，31，11： | 1 |
| 15 | Mapping brain circuitry with a light microscope显示文摘 | Osten P Margire TW | 2013 | Nat Methods2013，10，6： | 1 |
| 16 | Clinical nutrition scores are superior for the prognosis of hemodialysis patients compared to lab markers and bioelectrical impedance显示文摘 | FIEDLER R JEHLE P M OSTEN B | 2009 | Nephrol Dial Transplant2009，24，12： | 1 |
| 17 | Growth of an inverse tetragonal distorted SiGe layer on Si (001) by adding small amounts of carbon 显示文摘 | Osten H J Bugiel E Zaumseil P | 1994 | Appl Phys Lett1994，64，25： | 1 |
| 18 | Raman investigations of elastic strain relief in Si1-xGex layers on patterned silicon substrate显示文摘 | Dietrich B Bugiel E Osten H | 1993 | J Appl Phys1993，，74： | 1 |
| 19 | Tomographic imaging of photonic crystal fibers 显示文摘 | GORSKI W OSTEN W | 2007 | Optics Letter2007，35，14： | 1 |
| 20 | Reconstruction ofin-line digital holograms from two intensity measurements显示文摘 | ZHANG Yan Pedrini G Osten W | 2004 | Optics Letter2004，29，15： | 1 |
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