DEVICE AND METHOD FOR DETERMINING physical parameters within the object INTERACTION WITH Acoustoelectric

摘要

1. An apparatus for determining the dielectric function inside an object, said device soderzhitpo least a first transmitter (42) configured to transmit the first type of radiation through said object, and at least a first receiver (43) configured to receive a transmitted radiation of the first type, characterized in that the apparatus further soderzhitpo least a second transmitter configured to emit radiation of a second type through said object, wherein the radiation ne first- and second-types have different frequency spectra and are emitted so that propagate simultaneously in said object and to generate where the variation of the density and acoustoelectric interaction, means for analyzing the first type of radiation transmitted through the density variation to determine said acoustoelectric interaction (5) in the object, and means for calculating the dielectric function in the object based on the determined acoustoelectric vzaimodeystvii.2. The apparatus of claim 1, wherein the device further comprises a first generator (51) connected to at least one transmitter (42) and configured to generate and transmit a transmission signal, having a first fixed frequency (f) .3. The apparatus according to claim 1 or 2, wherein the apparatus further comprises means for determining the attenuation comprising: a mixer configured to produce an intermediate frequency (IF) signal by mixing the received first type of radiation from said at least one receiver (43) with signal het