Method for the Investigation of Acoustic Lenses with Optical Interferometric System
It is well known that the output function (image) formed by coherent waves with the use of convergent lenses is a convolution of the input function (object) and the spread function. In case of a diffreaction limited lens the spread function is just Fourier transform of the aperture. This is true not only in case of optical lenses and electromagnetic waves but also when the ultrasonic lens form the pressure distribution corresponding to the image.
KeywordsFocal Plane Displacement Amplitude Spherical Aberration Acoustical Image Acoustic Axis
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