Laser: Bauformen, Strahlfuerung, Anwendungen by J. Eichler, H.J. Eichler

By J. Eichler, H.J. Eichler

Das Buch vermittelt Basiswissen ?ber Physik und Technik des Lasers. Den Autoren gelingt es, alle f?r das Verst?ndnis der Lasertechnik notwendigen physikalischen Zusammenh?nge ohne einen aufwendigen mathematischen Apparat zu erl?utern. In 24 Kapiteln werden die verschiedenen Laserarten, die Eigenschaften der Laser und optische Elemente vorgestellt. Auf den Anlagenaufbau und Betrieb von Lasern wird ebenso eingegangen wie auf Einsatzm?glichkeiten, z.B. in der Messtechnik und der Materialbearbeitung. Auch Aspekte der Sicherheit von Lasereinrichtungen werden ber?cksichtigt. Zu jedem Kapitel werden ?bungen und vollst?ndige L?sungen angeboten. F?r die five. Auflage dieses erfolgreichen Standardwerkes wurde der Stoff dem neuesten Stand der Technik angepasst, z.B. in den Abschnitten zur CCD-Kamera und den Halbleiterlasern. Moderne Entwicklungen der Hochleistungs- und Kurzpulslaser sowie der Blue Laser und Quantenkaskadenlaser werden ber?cksichtigt. Ein Buch f?r Studenten von Universit?ten und Fachhochschulen sowie f?r Ingenieure in der Praxis.

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12 according to the industry standard of China. Generally, there are different gradation for clastic rocks and carbonate rocks due to different types, size, and scale of pores in the two types of rocks. 4 Dual Porosity* Dual porosity has been developed in the oil industry to deal with specific problems associated with fractured petroleum reservoirs. In the most general sense, the use of dual porosity indicates that the reservoir has a complex porosity system that can be divided into fracture porosity and a smaller scale porosity that exists in the pore spaces within the rocks [32].

Huang (a) Interparticle pores in sandstone (b) Intraparticle dissolved pore (c) Intercrystalline pore in doloston (d) Fenestral pores (white areas) (e) Moldic pore (g) Tectonic fractures (f)Vuggy (h) Dissolved fracture Fig. 14 Illustration of pore genetic type in reservoir rocks 2 Physical Properties of Reservoir Rocks 29 cement, matrix, and framework. Typically, in any rock it is all the grains of one particular type that are dissolved. Therefore, it requires a distinctive mineralogical or microstructural difference between the solubility of grains and matrix or cements.

11), the specific surface area of the medium can be easily determined by the formula: S = 8 Â 4pR2/(4R)3. Obviously, the specific surface area of a porous medium is inversely proportional to the particle radius (R) packing the medium. This conclusion also applies to sedimentary rocks. The specific surface areas of clastic rocks generally increase with the decrease in Fig. 11 Packing of spherical particles 22 XT. Hu and S. 6). Therefore, specific surface area can characterize the average size and the dispersion degree of rock particles.

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