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Optical Imaging Through Turbid Media with a Degenerate Four-wave Mixing Correlation Time Gate

Optical Imaging Through Turbid Media with a Degenerate Four-wave Mixing Correlation Time Gate
Author:
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Total Pages:
Release: 1998
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ISBN:

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Optical imaging through turbid media is demonstrated using a degenerate four-wave mixing correlation time gate. An apparatus and method for detecting ballistic and/or snake light while rejecting unwanted diffusive light for imaging structures within highly scattering media are described. Degenerate four-wave mixing (DFWM) of a doubled YAG laser in rhodamine 590 is used to provide an ultrafast correlation time gate to discriminate against light that has undergone multiple scattering and therefore has lost memory of the structures within the scattering medium. Images have been obtained of a test cross-hair pattern through highly turbid suspensions of whole milk in water that are opaque to the naked eye, which demonstrates the utility of DFWM for imaging through turbid media. Use of DFWM as an ultrafast time gate for the detection of ballistic and/or snake light in optical mammography is discussed.


Optical Imaging Through Turbid Media Using a Degenerate-four-wave Mixing Correlation Time Gate

Optical Imaging Through Turbid Media Using a Degenerate-four-wave Mixing Correlation Time Gate
Author:
Publisher:
Total Pages: 7
Release: 1998
Genre:
ISBN:

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This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The authors have demonstrated the use of a degenerate-four-wave-mixing time gate to allow imaging through turbid media, with potential application to tissue imaging. A near infrared (NIR), long-pulse Cr{sup +3}:Li2SrAlF6 laser was used as the light source (during most the project) for imaging through clear and turbid media. Preliminary experiments were also carried out with a continuous diode laser.


Imaging Through Turbid Media with a Nonlinear-optical Correlation Time Gate

Imaging Through Turbid Media with a Nonlinear-optical Correlation Time Gate
Author:
Publisher:
Total Pages: 5
Release: 1996
Genre:
ISBN:

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Experiments directed towards a clinically useful optical imaging system use long-pulse near-infrared lasers and a correlation time gate based on degenerate four-wave mixing in a nonlinear medium.


Deep Imaging in Tissue and Biomedical Materials

Deep Imaging in Tissue and Biomedical Materials
Author: Lingyan Shi
Publisher: CRC Press
Total Pages: 524
Release: 2017-03-16
Genre: Medical
ISBN: 1351797395

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The use of light for probing and imaging biomedical media is promising for the development of safe, noninvasive, and inexpensive clinical imaging modalities with diagnostic ability. The advent of ultrafast lasers has enabled applications of nonlinear optical processes, which allow deeper imaging in biological tissues with higher spatial resolution. This book provides an overview of emerging novel optical imaging techniques, Gaussian beam optics, light scattering, nonlinear optics, and nonlinear optical tomography of tissues and cells. It consists of pioneering works that employ different linear and nonlinear optical imaging techniques for deep tissue imaging, including the new applications of single- and multiphoton excitation fluorescence, Raman scattering, resonance Raman spectroscopy, second harmonic generation, stimulated Raman scattering gain and loss, coherent anti-Stokes Raman spectroscopy, and near-infrared and mid-infrared supercontinuum spectroscopy. The book is a comprehensive reference of emerging deep tissue imaging techniques for researchers and students working in various disciplines.


Photonics, Volume 4

Photonics, Volume 4
Author: David L. Andrews
Publisher: John Wiley & Sons
Total Pages: 604
Release: 2015-02-27
Genre: Technology & Engineering
ISBN: 1119011795

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Discusses the basic physical principles underlying Biomedical Photonics, spectroscopy and microscopy This volume discusses biomedical photonics, spectroscopy and microscopy, the basic physical principles underlying the technology and its applications. The topics discussed in this volume are: Biophotonics; Fluorescence and Phosphorescence; Medical Photonics; Microscopy; Nonlinear Optics; Ophthalmic Technology; Optical Tomography; Optofluidics; Photodynamic Therapy; Image Processing; Imaging Systems; Sensors; Single Molecule Detection; Futurology in Photonics. Comprehensive and accessible coverage of the whole of modern photonics Emphasizes processes and applications that specifically exploit photon attributes of light Deals with the rapidly advancing area of modern optics Chapters are written by top scientists in their field Written for the graduate level student in physical sciences; Industrial and academic researchers in photonics, graduate students in the area; College lecturers, educators, policymakers, consultants, Scientific and technical libraries, government laboratories, NIH.


Holography, 3D Imaging and 3D Display

Holography, 3D Imaging and 3D Display
Author: Ting-Chung Poon
Publisher: MDPI
Total Pages: 364
Release: 2021-02-19
Genre: Technology & Engineering
ISBN: 3039435957

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Modern holographic techniques have been successfully applied in many important areas, such as 3-D inspection, 3-D microscopy, metrology, and profilometry, augmented reality, and industrial informatics. This Special Issue covers selected pieces of cutting-edge research works, ranging from low-level acquisition, to high-level analysis, processing, and manipulation of holographic information. The Special Issue also serves as a comprehensive review of existing state-of-the-art techniques in 3-D imaging and 3-D display, as well as broad insights into the future development of these disciplines. The Special Issue contains 25 papers in the field of holography, 3-D imaging, and 3-D display. All the papers underwent substantial peer review under the guidelines of Applied Sciences.


Biomedical Optics

Biomedical Optics
Author: Lihong V. Wang
Publisher: John Wiley & Sons
Total Pages: 378
Release: 2007-05-29
Genre: Science
ISBN: 0471743046

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This entry-level textbook, covering the area of tissue optics, is based on the lecture notes for a graduate course (Bio-optical Imaging) that has been taught six times by the authors at Texas A&M University. After the fundamentals of photon transport in biological tissues are established, various optical imaging techniques for biological tissues are covered. The imaging modalities include ballistic imaging, quasi-ballistic imaging (optical coherence tomography), diffusion imaging, and ultrasound-aided hybrid imaging. The basic physics and engineering of each imaging technique are emphasized. A solutions manual is available for instructors; to obtain a copy please email the editorial department at [email protected].


Energy and Water Development Appropriations for 1999

Energy and Water Development Appropriations for 1999
Author: United States. Congress. House. Committee on Appropriations. Subcommittee on Energy and Water Development
Publisher:
Total Pages: 2032
Release: 1998
Genre: Energy development
ISBN:

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