Dynamic phase focus for coherent imaging beam formation

Measuring and testing – Vibration – By mechanical waves

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12866101, G01N 2900

Patent

active

051116952

ABSTRACT:
A method for dynamic focus of received energy, in a vibratory energy imaging system, into a beam in which contribution from transducers in an array of N such transducers, are progressively enabled to contribute to beam focussing dependent upon distance between a particular j-th transducer (where 1.ltoreq.j.ltoreq.N) is responsive to the depth, or range R, of the focal point at any instant of time; the initial steering angle .theta., with respect to the array normal, is used in conjunction with a range clock, to determine the time when each off-normal transducer channel is enabled to add to the beam (dynamic apodization) and to finely adjust the channel time delay to properly focus the beam after the enablement of the channel.

REFERENCES:
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patent: 4835689 (1989-05-01), O'Donnell et al.
patent: 4886069 (1989-12-01), O'Donnell et al.
patent: 5005419 (1991-04-01), O'Donnell et al.

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