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  • 1
    Electronic Resource
    Electronic Resource
    Exact computation of spherical harmonics (1984)
    Springer
    Computing 32 (1984), S. 365-378 
    Details
    ISSN: 1436-5057
    Keywords: 33A45 ; 65D20 ; Spherical harmonics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Zusammenfassung Wesentliche Eigenschaften der Theorie der Kugelfunktionen werden rekapituliert durch innere Eigenschaften des Raumes der homogenen harmonischen Polynome vom Graden inq Dimensionen. Die theoretischen Betrachtungen werden benutzt, um eine Alternative zur konventionellen Methode der Konstruktion von Kugelfunktionen durch Rekursion zu beschreiben. Die numerische Effektivität wird erläutert, Beispiele werden angegeben für den dreidimensionalen Fall.
    Notes: Abstract Essential results of the theory of spherical harmonics are recapitulated by intrinsic properties of the space of homogeneous harmonic polynomials of degreen and dimensionq. The theoretical considerations are used to describe an alternate method to the conventional procedure of constructing spherical harmonics by recursion. The numerical efficiency is explained, examples are given for the threedimensional case.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02243779
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    An integrated organic photoconductive detector for optoelectronics (1989)
    Springer
    Applied physics 48 (1989), S. 219-224 
    Details
    ISSN: 1432-0649
    Keywords: 42.80 ; 42.82 ; 72.40
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In the system (poly-(N-vinyl carbazole) (PVK): trinitrofluorenone (TNF) a photoconductive complex is formed. Thin metal films are sputtered on BK7 glass substrates, forming two electrodes with 1 mm separation. The photoconductive complex is deposited from a solution in chlorobenzene/tetrahydrofurane on the glass substrate between the electrodes, forming a photoconductive detector. Photoconductivity of these planar detectors is studied using He-Ne laser light (λ=633 nm) as a function of electric field and for different TNF concentrations. An increase of photosensitivity is found for high TNF concentrations. Time resolution of the photoconductive PVK:TNF detector is investigated using a ruby pulse laser (λ=694 nm). The possible use of such detectors in combination with other polymer lightguides is demonstrated. Compared to most polymer waveguide materials PVK exhibits a rather high refractive index ofn=1.7. Thus the coupling of light into the photoconductive film is achieved directly. The planar structure allows further integration of polymeric components for optoelectronics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00694348
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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