G - Physics – 01 – N
Patent
G - Physics
01
N
349/35
G01N 29/00 (2006.01)
Patent
CA 1161541
PHN 9605 11 2-10-1980 ABSTRACT "Method of and device for examination by means of ultrasonic beams." A method of and a device for ultrasonic examination of an object by means of a row of N electroacoustic transducers. Each time a group of M transducers (M ? N) thereof is selected by means of a switching member. These M transducers are first included in transmission networks, transmission signals then being applied to the converters; subsequently, they are included in receive networks, receive signals then being applied to a display device. The transmission and/or receive signals are multiplied by weighting factors between 0 and 1. The sum of the weighting factors during transmisison may deviate from that during reception. During transmisison and/or reception, at least two different combinations of weighting factors are used, the sum thereof being each time the samR. The scanning line density can thus be substantially increased.
363119
Van Heelsbergen Teunis R.
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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