Abstract: This paper discusses the fundamental relation for reconstructing a multifrequency hologram with computer. For acquiring better images, we study the dependences of the frequency bandwidths, the aperture and frequency discrepancies on the point expansive function of the single object point.
It is useful for decreasing ambiguity of the image to increase frequency bandwidths and aperture size.
The amplitude and the phase of ultrasonic waves scattered by two thin metal wires in the water tank are measured. The image of the two thin metal wires is given by computer.