Transducer for medical imaging which transmits a first harmonic and predominantly receives second harmonics
摘要
The piezoelectric transducer (10) is active at two different frequencies. A piezoelectric arrangement has a series of piezoelectric layers (12) extending from a first to a second piezoelectric surface and electrodes (14B) between adjacent layers. First and second electrodes (14A,14C) contact the first and second surfaces and apply a voltage difference across the piezoelectric arrangement, which is connected to a transmission/reception line. A first changeover switch switches between the two frequencies.
申请公布号
DE19701334(A1)
申请公布日期
1997.10.02
申请号
DE19971001334
申请日期
1997.01.16
申请人
HEWLETT-PACKARD CO., PALO ALTO, CALIF., US
发明人
OSSMANN, WILLIAM J., ACTON, MASS., US;PENDERGRASS, LARRY, SANTA ROSA, CALIF., US;MASON, MARTIN K., ANDOVER, MASS., US