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Generation of Large Area Acoustic Beams
Photoconductive Transducers for Scanned Acoustical
acoustic resonances acoustic waves acoustical energy acoustical power amplitude aperture bandwidth biological capacitance carrier lifetime cavity dimensions Cd anneal CdS film CdS transducer CdSe cell chapter coaxial conductive losses configuration contrast sensitivity conversion loss cylindrical dielectric resonator dark resistivity deflection determined diameter dielectric resonator excitation diffraction ducer efficiency electric field electron elements equivalent circuit fi-cm focusing geometry group velocity He-Ne laser Holography illumination image information input and output laboratory lens light spot limited longitudinal wave material maximum measured microns microwave microwave frequencies numerical aperture object optical optimum orders of magnitude output transducers parameters photoconductively scanned imaging photoexcitation photosensitive piezoelectric semiconductor propagation radiation conductance receiving transducer rutile rod sapphire scanned imaging system scanning acoustical microscope scanning microscope shown in Fig spherical aberration sputtered stub tuner switching ratio technique thermal noise trans transducer performance voltage wave vector wavelength