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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 58 (1994), S. 317-321 
    ISSN: 1432-0649
    Keywords: 42.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The nonlinear surface susceptibility χ S (2) is generally referred to the system of Cartesian coordinates of thesample. However, since actual measurements take place with respect to thelaboratory system of coordinates, appropriate transformation of χ S (2) is necessary to deduce the underlying susceptibility-components. We demonstrate this by analyzing the second-harmonic signal generated by an inclined sample upon rotation around thes-axis of the laboratory system of coordinates. The sample consists of two Langmuir-Blodgett-type monolayers of rotational symmetry around the sample normal, the two layers being separated by a plane-parallel flat of 1 mm thickness. The occurrence of a “symmetry-forbidden”I SS 2ω -signal is discussed in detail.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of biological physics 23 (1997), S. 73-88 
    ISSN: 1573-0689
    Keywords: OPTO-RETINA ; 3D grating ; 3D vision ; 4D vision ; Colour vision ; Polymer ; Latex ; Image pre-processing ; Diffraction ; Conoscopical microscopy.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract The ‘inverted’ retina of the human eye can beemulated by multilayer gratings from polymer latexparticles located in the image plane of opticalsystems. This so called OPTO-RETINA provides v. Laueinterference patterns in visible light with atrichromatic characteristic containing,simultaneously, local spatiotemporal direction anddistance information, which are relevant to 3Dspatial vision and 4D spatiotemporal Fouriercorrelator-optical preprocessing in shape andmotion analysis.As a first step in the realization of OPTO-RETINAproperties the formation of hexagonally orderedmonolayers of polystyrene latex sphereswith diameters in the~μm range is reported and firstresults of diffraction and dispersion of white lightby these layers obtained by conoscopical opticalmicroscopy are presented.
    Type of Medium: Electronic Resource
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