From Lighthouses To Laserbeams

The practice of shaping the irradiance profile of laser beams goes back more than three decades, and the applications of beam shaping are as diverse as they are numerous. However, until Dickey and Holswade's groundbreaking and highly popular Laser Beam Shaping: Theory and Techniques was published, there was no single, detailed treatment available on the underlying theory and basic techniques of beam shaping. Building on the foundations of this previous work, these esteemed editors have teamed with recognized expert David L. Shealy to produce the first in-depth account of beam shaping applications and design. Laser Beam Shaping Applications details the important features of beam shaping and exposes the subtleties of the theory and techniques that are best demonstrated through proven applications. In chapters contributed by prominent, active leaders in their respective specialties, the book discusses applications in lithography, laser printing, optical data storage, stable isotope separation, adaptive mirrors, and spatially dispersive lasers. The contributors share major insights, knowledge, and experience, reveal the advantages of the technologies, and include extensive references to the literature. The book concludes with a summary of beam shaping theory and techniques as well as the history of the field. Providing practical expertise, Laser Beam Shaping Applications is an extremely helpful guide to improving current laser processes, optimizing application-specific technologies, and advancing future development in the field.

What is a lighthouse? What does it mean? What does it do? This book shows how exchanging knowledge across disciplinary boundaries can transform our thinking. Adopting an unconventional structure, this book involves the reader in a multivocal conversation between scholars, poets and artists. Seen through their individual perspectives, lighthouses appear as signals of safety, beacons of enlightenment, phallic territorial markers, and memorials of historical relationships with the sea. However, the interdisciplinary conversation also reveals underlying and sometimes unexpected connections. It elucidates the human and non-human evolutionary adaptations that use light for signalling and warning; the visual languages created by regularity and synchronicity in pulses of light; how lighthouses have generated a whole ‘family’ of related material objects and technologies; and the way that light flows between social and material worlds.

This text provides all the basic information needed to research, develop, and design beam shaping systems. It includes sections on: diffraction theory, geometrical optics, shaping element design, beam profile measurement technology with applications and techniques for lossless beam shaping.

Produced in association with the Museum of Broadcast Communications in Chicago, the Encyclopedia of Radio includes more than 600 entries covering major countries and regions of the world as well as specific programs and people, networks and organizations, regulation and policies, audience research, and radio's technology. This encyclopedic work will be the first broadly conceived reference source on a medium that is now nearly eighty years old, with essays that provide essential information on the subject as well as comment on the significance of the particular person, organization, or topic being examined.

The secrets, the myths and the facts behind Washington, D.C.'s design and its Masonic significance. In this groundbreaking, original work, David Ovason reveals the intimate connections between the mysterious zodiacal symbols and the stellar lore of Washington, D.C. and the secret plan for the city. There are over fifty complete zodiacs in Washington, D.C., all witness to an extraordinary stellar mystery. Why did generations of architects and artists put their lives and energies on the line, when designing this City of the Stars? What was their shared secret language? What or who drove them to create a city overflowing with such esoteric symbolism? What is the meaning behind the secret symbolism of Washington, D.C.'s layout? And what does it mean for America's future?