发明名称 |
Ultrasonic holography imaging device having a macromolecular piezoelectric element transducer |
摘要 |
An ultrasonic image device such as may be used in a holography system or scanning system and having a piezoelectric transducer in which the conversion efficiency and phase are substantially constant over a wide frequency range. A piezoelectric sheet 5 mu m to 1000 mu m thick is used for a piezoelectric element. The piezoelectric sheet is constructed of a macromolecular material including polymers and copolymers of polar monomers. A high frequency signal input device applies to the electrodes coupled to the piezoelectric sheet high frequency signals of different frequencies in a range around a fundamental resonance of the piezoelectric sheet of +/-10 to +/-70% of the fundamental resonance frequency.
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申请公布号 |
US4412147(A) |
申请公布日期 |
1983.10.25 |
申请号 |
US19800203838 |
申请日期 |
1980.11.04 |
申请人 |
KUREHA KAGAKU KOGYO KABUSHIKI KAISHA |
发明人 |
NAGURA, MASATO;KIKUCHI, KAZUSHIGE;OBARA, HIROSHI;ENDO, YASUSHI |
分类号 |
A61B8/00;B06B1/06;G01S15/89;G03H3/00;H04R17/00;(IPC1-7):H01L41/00 |
主分类号 |
A61B8/00 |
代理机构 |
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地址 |
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