Modification of the scanning laser acoustic microscope for holographic and tomographic imaging

Lee, Hua; Ricci, Carlos
November 1986
Applied Physics Letters;11/17/1986, Vol. 49 Issue 20, p1336
Academic Journal
In this letter, we report the modification of the scanning laser acoustic microscope for the purpose of holographic and tomographic imaging. A very simple quadrature receiver is utilized to perform holographic recording of the resultant acoustic wave field. This quadrature detector mainly consists of a highpass-lowpass circuit pair and a multiplier, and is capable of generating accurate dual reference signals. In addition to the circuit design and frequency characteristics of the filter pair, we also provide the holographic image of a range finder reconstructed by using backward propagation method to demonstrate the resolution improvement due to this modification.


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