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Books > Science & Mathematics > Physics > Optics (light)
Laser processing of solid materials has been commonly performed in
gas ambient. Having the workpiece immersed into liquid, having a
liquid film on it, or soaking the material with liquid gives
several advantages such as removal of the debris, lowering the heat
load on the workpiece, and confining the vapour and plasma,
resulting in higher shock pressure on the surface.
Introduced in the 1980s, neutral liquids assisted laser processing
(LALP) has proved to be advantageous in the cutting of
heat-sensitive materials, shock peening of machine parts, cleaning
of surfaces, fabrication of micro-optical components, and for
generation of nanoparticles in liquids. The liquids used range from
water through organic solvents to cryoliquids.
The primary aim of the book is to present the essentials of
previous research (tabulated data of experimental conditions and
results), and help researchers develop new processing and
diagnostics techniques (presenting data of liquids and a review of
physical phenomena associated with LALP). Engineers can use the
research results and technological innovation information to plan
their materials processing tasks.
Laser processing in liquids has been applied to a number of
different tasks in various fields such as mechanical engineering,
microengineering, chemistry, optics, and bioscience. A
comprehensive glossary with definitions of the terms and
explanations has been added.
The book covers the use of chemically inert liquids under normal
conditions. Laser chemical processing examples are presented for
comparison only.
- First book in this rapidly growing field impacting mechanical and
micro/nano-engineering
- Covers different kinds of liquid-assisted laser processing of a
large variety of materials
- Covers lasers emitting from UV to IR with pulse lengths down to
femtoseconds
- Reviews over 500 scientific articles and 300 inventions and
tabulates their main features
- Gives a qualitative and quantitative description of the physical
phenomena associated with LALP
- Tabulates 61 parameters for 100 liquids
- Glossary of over 200 terms and abbreviations
This book brings together two broad themes that have generated a
great deal of interested and excitement in the scientific and
technical community in the last 100 years or so: quantum tunnelling
and nonlinear dynamical systems. It applies these themes to
nanostructured solid state heterostructures operating at room
temperature to gain insight into novel photonic devices, systems
and applications.
The study of light has been an important part of science from its
beginning. The ancient Greeks and, prior to the Middle Ages,
Islamic scholars provided important insights. With the coming of
the Scientific Revolution in the 16th and 17th centuries, optics,
in the shape of telescopes and microscopes, provided the means to
study the universe from the very distant to the very small. Newton
introduced a scientific study of the nature of light itself and
today optics remains a key element of modern science, not only as
an enabling technology, but in quantum optics, as a means of
testing our fundamental understanding of quantum theory and the
nature of reality itself.
This volume presents six review articles devoted to various topics
of current interest both in classical and in quantum optics. The
first article, by S. Ya. Kilin, entitled "Quanta and Information",
is concerned with a multidisciplinary subject which involves
optics, information theory, programming and discrete mathematics.
The second article, "Optical Solitons in Periodic Media with
Resonant and Off-Resonant Nonlinearities", by G. Kurizki, A.E.
Kozhekin, T. Optatrny and B. Malomed, reviews the properties of
optical solitons in periodic nonlinear media. The article which
follows deals with an effect and its inverse which is a
manifestation of hindrance and enhancement, respectively, of the
evolution of a quantum system by an external agent, such as a
detection apparatus. The fourth article discusses the current
status of a relatively new branch of physical optics, sometimes
called singular optics. The next two articles respectively present
a review of advances in two-photon interferometry and their
relation to investigations of the foundations of quantum theory and
an examination of transverse mode shaping and selection in laser
resonators.
The first part of this text provides an overview of the physics of
lasers and it describes some of the more common types of lasers and
their applications. The production of laser light requires the
formation of a resonant cavity where stimulated emission of
radiation occurs. The light produced in this way is intense,
coherent and monochromatic. Applications of lasers include CD/DVD
players, laser printers and fiber optic communication devices.
While these devices depend largely on the monochromaticity and
coherence of the light that lasers produce, other well-known
applications, such as laser machining and laser fusion depend on
the intensity of laser light. The second part of the book describes
the phenomenon of Bose-Einstein condensation. These condensates
represent a state of matter that exists in some dilute gases at
very low temperature as predicted first by Satyendra Nath Bose and
Albert Einstein. Bose-Einstein condensates were first observed
experimentally in 1995 by Eric Cornell and Carl Wieman at the
University of Colorado, and shortly thereafter by Wolfgang Ketterle
at the Massachusetts Institute of Technology. The experimental
techniques used to create a Bose-Einstein condensate provide an
interesting and unconventional application of lasers: the cooling
and confinement of a dilute gas at very low temperature.
Parkinson's disease is a neurological disorder with cardinal motor
signs of resting tremor, bradykinesia and lead-pipe rigidity. In
addition, many patients display non-motor symptoms, including a
diminished sensation of smell, gastrointestinal problems, various
disorders of sleep and some cognitive impairment. These clinical
features - particularly the motor signs - manifest after a
progressive death of many dopaminergic neurones in the brain.
Conventional therapies can reduce the signs of the disease,
however, the progression of this neuronal demise has proved
difficult to slow or stop, and the condition is relentlessly
progressive. Hence, there is a real need to develop a treatment
that is neuroprotective and slows the pathology of the disease
effectively. At present, there are several neuroprotective
therapies in the experimental pipeline, but these are for the
patients of tomorrow. This book focuses on two therapies that are
readily available for the patients of today. They involve the use
of exercise and light (i.e. photobiomodulation: the use of red to
infrared light therapy on body tissues). Given the heterogeneity of
Parkinson's disease in humans, tackling the condition from a range
of different angles - with several different therapies - would only
serve to enhance the positive outcomes. This book considers the use
of exercise and light therapies, proposing that they have the
potential to make a powerful "dynamic duo", offering a most
effective neuroprotective treatment option to patients.
The Seventh International Conference series on Vision in Vehicles
was held in Marseilles in September 1997. This event was run in
conjunction with the Applied Vision Association, the Ergonomics
Society and with the participation of INRETS (Institut National de
Recherche sur les Transports et leur Securite).
This volume presents the selected and edited proceedings. The
papers at the conference were ordered into sessions, from
driver-specific aspects to interfacing with the new in-vehicle
systems. These sessions are mirrored in the ordering of the
chapters. The conference is long established and regularly draws
representatives from the key international research centres working
in this popular and diverse transportation area.
This is the third volume of the very successful set. This updated
volume will contain non-linear properties of some of the most
useful materials as well as chapters on optical measurement
techniques.
* Contributors have decided the best values for "n" and
"k"
* References in each critique allow the reader to go back to the
original data to examine and understand where the values have come
from
* Allows the reader to determine if any data in a spectral region
needs to be filled in
* Gives a wide and detailed view of experimental techniques for
measuring the optical constants "n" and "k"
* Incorporates and describes crystal structure, space-group
symmetry, unit-cell dimensions, number of optic and acoustic modes,
frequencies of optic modes, the irreducible representation, band
gap, plasma frequency, and static dielectric constant
Since 1965, Advances in Magnetic and Optical Resonance has provided
researchers with timely expositions of fundamental new developments
in the theory of, experimentation with, and application of magnetic
and optical resonance.
This book is a long-term history of optics, from early Greek
theories of vision to the nineteenth-century victory of the wave
theory of light. It shows how light gradually became the central
entity of a domain of physics that no longer referred to the
functioning of the eye; it retraces the subsequent competition
between medium-based and corpuscular concepts of light; and it
details the nineteenth-century flourishing of mechanical ether
theories. The author critically exploits and sometimes completes
the more specialized histories that have flourished in the past few
years. The resulting synthesis brings out the actors' long-term
memory, their dependence on broad cultural shifts, and the
evolution of disciplinary divisions and connections. Conceptual
precision, textual concision, and abundant illustration make the
book accessible to a broad variety of readers interested in the
origins of modern optics.
Optics of the Moon presents methods for interpreting optics of
surfaces on the Moon with complicated structures. For example, the
book illustrates how phase-ratio techniques can lead to the
detection of surface structure anomalies, describes polarimetric
studies of the lunar surface and their use, and addresses many
other questions relating to the regolith-like surfaces of the Moon,
such as why the Moon looks like a ball at a large phase angle and
like a disk in full moon, why the lunar surface has slight color
variations, and why at large phase angles its polarization degree
closely correlates with albedo.
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