Summary form only given. Conventional lenses are based on refraction, while a Fresnel binary lens operates by diffraction. Fresnel lenses offer the ability to perform unique beam manipulation and frequency-dependent focusing. The linearly frequency-dependent focal length of a Fresnel lens allows tomographic imaging of a target using multiple frequencies. Objects at various locations along the beam propagation path are uniquely imaged on the same imaging plane using a Fresnel lens with different frequencies of the imaging beam. This procedure allows the reconstruction of an object's tomographic contrast image by assembling the frequency-dependent images, and provides a new tomographic imaging modality.


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    Titel :

    Tomographic imaging with terahertz pulses


    Beteiligte:
    Zhang, X.-C. (Autor:in)


    Erscheinungsdatum :

    2002-01-01


    Format / Umfang :

    126029 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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