Ulf Schnars

This book presents a self-contained treatment of the principles and major applications of digital hologram recording and numerical reconstruction (Digital Holography). This second edition has been significantly revised and enlarged. The authors have extended the chapter on Digital Holographic Microscopy to incorporate new sections on particle sizing, particle image velocimetry and underwater holography. A new chapter now deals comprehensively and extensively with computational wave field sensing. These techniques represent a fascinating alternative to standard interferometry and Digital Holography. They enable wave field sensing without the requirement of a particular reference wave, thus allowing the use of low brilliance light sources and even liquid-crystal displays (LCD) for interferometric applications.

This book presents a self-contained treatment of the principles and major applications of digital hologram recording and numerical reconstruction (Digital Holography). This second edition has been significantly revised and enlarged. The authors have extended the chapter on Digital Holographic Microscopy to incorporate new sections on particle sizing, particle image velocimetry and underwater holography. A new chapter now deals comprehensively and extensively with computational wave field sensing. These techniques represent a fascinating alternative to standard interferometry and Digital Holography. They enable wave field sensing without the requirement of a particular reference wave, thus allowing the use of low brilliance light sources and even liquid-crystal displays (LCD) for interferometric applications.

Dieses Buch bewertet Risiken des t glichen Lebens. Von A wie Aids bis Z wie Zugfahren werden mehr als 50 Gefahrenquellen hinsichtlich ihres Gefahrenpotentials analysiert. Das Buch wendet sich an alle, die schon immer wissen wollten, ob Fallschirmspringen oder Motorradfahren gef hrlicher ist, um wie viele Jahre das Rauchen unser Leben verk rzt, oder ob es gerechtfertigt ist, vor Terroranschl gen Angst zu haben. Ein kleine Auswahl der Stichw rter: Arbeitsunf lle, Asbest Blitzschlag, Bungee-Springen, Fallschirmspringen, Fliegen, Feinstaub, Drogen, Kernenergie, Meteoriteneinschlag, Elektrosmog, Stra enverkehr, ungesunde Ern hrung.

Sag’ ich zum Augenblicke verweile doch, Du bist so schön J. W. v. Goethe, „Faust“ An old dream of mankind and a sign of culture is the conservation of moments by taking an image of the world around. Pictures accompany the development of mankind. However, a picture is the two-dimensional projection of the thr- dimensional world. The perspective – recognized in Europe in the Middle Ages – was a first approach to overcome the difficulties of imaging close to reality. It took up to the twentieth century to develop a real three-dimensional imaging: - bor invented in 1948 holography. Yet still one thing was missing: the phase of the object wave could be reconstructed optically but not be measured directly. The last huge step to the complete access of the object wave was Digital Holography. By Digital Holography the intensity and the phase of electromagnetical wave fields can be measured, stored, transmitted, applied to simulations and mani- lated in the computer: An exciting new tool for the handling of light. We started our work in the field of Digital Holography in 1990. Our motivation mainly came from Holographic Interferometry, a method used with success for precise measurement of deformation and shape of opaque bodies or refractive - dex variations within transparent media. A major drawback of classical HI using photographic plates was the costly process of film development.