Applied Laser Medicine by G. Müller (auth.), Professor Dr. H.-Peter Berlien, Professor

By G. Müller (auth.), Professor Dr. H.-Peter Berlien, Professor Dr.-Ing. Gerhard J. Müller (eds.)

The heritage of laser purposes in drugs begins al­ within the early Nineties a concerted motion application such a lot with the discovery of the laser itself. backed by means of the ecu fee was once conducted in Europe for the dissemination of the secure use of It used to be just a couple of months after Maiman's invention lasers in drugs, and in 1996 an identical software was once while this new high-intensity gentle resource used to be used for scientific purposes. mild as a healing device constructed with Russia. It used to be this German--Russian had lengthy been utilized in medication, specially in oph­ cooperation that ended in a Russian model of the Ger­ thalmology and dermatology. consequently, those disci­ guy unique loose-leaf instruction manual. The editors genuine­ plines have been the 1st to exploit this new software. ized an ever-growing call for for an English model of this guide, too. as a result, the editors are very even though the early effects weren't as promising as thankful to the Springer publishing residence for aid­ anticipated, a brand new box for clinical prognosis and deal with­ ment were outlined. lots of the problems within the ing the English variation of the German original.

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Figure 6 demonstrates again the relation between radiation flux density inside a laser beam and the distance behind a lens. References 1. Kogelnik H, Li T (1966) Laser beams and resonators. Proc IEEE, vol 54 No 10 2. IffHinder I, Weber H (1986) Focussing of multimedia laser beams with variable beam parameters. 1 Nd:YAG Lasers B. Schaldach The Nd:YAG laser is at present the most important solid-state laser. g. in metal working, medicine and engineering. The essential advantages of the Nd:YAG laser are its simple and compact construction and its high average power output.

Gas ion lasers are relatively expensive, comparatively vibration-sensitive, and the serviceable life of the laser tubes is between 1000 and 10000 operating hours. 2 Fig. 3. Energy level scheme of an Ar ion laser. The flrst collision with an electron (e-impact) ionizes the Ar atom, the second electron impact raises the Ar ion from its ground state into higher, excited states. 2 51 4. 1 ns tJ 266 '"a. ~

2. --- 100 300 500 700 sponds to an operating time of about 10 - 20 days, assuming that the laser is running 4 h per day at 30 Hz. An argon fluoride fIlling working at 193 nm will barely last 1 day under the same conditions. Changing the wavelength of the excimer laser is very restricted in practice. An excimer laser operates without a problem only if operated with mixtures containing the same halogen. g. between the mixtures containing argon, krypton and xenon chloride, will cause no complications.

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Applied Laser Medicine by G. Müller (auth.), Professor Dr. H.-Peter Berlien, Professor
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