A limited frequency spectrum method for improving resolution of acoustical holographic imaging

In order to improve the resolution of acoustical holography, a new method, i. e. pulse wave holography, has been presented in the article. Theortical analysis and computer simulation show that using the limited frequency spectrum of pulse wave and the response to the limited frequency spectrum of the system, the pusle wave holography has a better resolution than the continuous wave one. Besides. adopting the phase information of reconstructed wave and deconvolution technology, the resolution can be improved further.