Zobrazeno 1 - 10
of 45
pro vyhledávání: '"T. Possner"'
Autor:
Sven T. Possner, Wittko Francke, Hans Tore Rapp, Volker Sinnwell, Stefan Franke, Frank C. Schroeder
Publikováno v:
Zeitschrift fur Naturforschung. C, Journal of biosciencesReferences. 72(7-8)
A new isoquinoline quinone system and its iodinated derivatives were isolated from the ascidian tunicate Ascidia virginea Müller 1776 (Phlebobranchia: Ascidiidae). Structures were elucidated by spectroscopic methods and derivatization reactions. Asc
Publikováno v:
Applied Physics B. 98:751-757
A quasi-monolithic second-harmonic-generation ring resonator assembled with miniaturized components is presented. The ring contains a 10-mm-long bulk periodically poled lithium niobate crystal for second-harmonic generation, four plane mirrors and tw
Publikováno v:
Chemoecology. 17:19-22
Hydroxydanaidal, the pyrrolizidine alkaloid-derived male corematal pheromone active in the close-range precopulatory interactions of the moth Utetheisa ornatrix, appears not to contribute to the chemical defense of this moth. The compound failed to m
Publikováno v:
Optics Communications. 188:267-273
We present an endoscope-compatible confocal laser scanning microscope (CLSM) for medical imaging. A gradient index (GRIN)-lens system projects a magnified image on the distal end of a fiber-optic imaging bundle, which transfers the image to a CLSM si
Autor:
Andreas Bräuer, C. Wächter, W. Karthe, Peter Dannberg, Ernst-Bernhard Kley, R. Göring, T. Poßner
Publikováno v:
Microsystem Technologies. 1:59-67
Micro- and integrated-optical devices in glass and polymers are integrated increasingly in microsystems. Design and simulation of such optical elements are well developed. Ray tracing and a manifold of propagation and field calculation methods are av
Publikováno v:
Journal of Lightwave Technology. 10:312-315
A numerical model based on the finite-element method for solving the nonlinear diffusion equation of ion-exchange in glasses is presented. The model is applied to the calculation of the concentration profile for a Ag/sup +/-Na/sup +/ ion-exchanged ch
Publikováno v:
Gradient Index Optical Systems.
Although the ion-exchange technique has been used for more than a century to produce tinted glass and for several decades for glass strengthening it received increasing attention during the last 10 years. This attention arises from demands of integra
Publikováno v:
Gradient Index Optical Systems.
The ion-exchange process is a well established technology for the generation of gradient-index elements /1/. Because of the high achivable refractive index differences and high transparency of the generated elements Tl-exchange is preferred. But besi
Publikováno v:
SPIE Proceedings.
Ion exchange in proper glass types developed especially for waveguide optics is a promising technique for the fabrication of passive integrated optical elements. Fundamentals of thermal and field assisted ion diffusion are investigated. Applications
Publikováno v:
SPIE Proceedings.
The attenuation of multimode-strip-waveguides produced by silver-sodium ion exchange in glass was determined by measurement of the insertion losses of the waveguide and calculation of coupling losses between a graded index fibre and the waveguide. Fo