Non-coherent frequency source and sector scanning apparatus...

Details Non-coherent frequency source and sector scanning apparatus... Non-coherent frequency source and sector scanning apparatus...

G - Physics

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G01H 9/00 (2006.01) G01S 7/52 (2006.01) G01S 7/64 (2006.01) G01S 15/89 (2006.01) G02F 1/13 (2006.01) G10K 11/35 (2006.01)

Patent

CA 1251552

ABSTRACT OF THE DISCLOSURE There is disclosed herein an ultrasonic imaging system using a liquid crystal detector cell and a source of non-coherent acoustic energy to produce substantially artifact-free images. The ultrasound source and cell are matched with one another, and the source is caused to operate over a range of frequencies or phases so as to produce the non-coherent ultrasonic energy. The frequency response of the cell and its response time are matched to the operating characteristics of the transducer. The transducer may be mounted in a pendulum-like sector scanning apparatus so as to assure a uniform insonification of the object, a uniform beam and a substantially uniform non-coherent insonification of the cell. The movement of the scanning apparatus is also matched to the cell and transducer characteristics.

511075

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