| 魏 炜,汪承灏.有平界面存在时时间反转法的自聚焦性能[J].,1999,18(3):1-5 |
| 有平界面存在时时间反转法的自聚焦性能 |
| Self-adaptive focusing by time reversal through interface between different media |
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| 中文摘要: |
| 时间反转法是一种具有独特优点的自适应聚焦方法，对超声成像中图象畸变的消除有重要价值。本文就声场中存在介质分平面时，对时间反转法实现自聚焦的声场给出了解析式；并运用所建立起来的时间反转成像实验系统进行了有平界面存在时的自聚焦实验，实验所得自聚焦增益与理论计算结果相符。 |
| 英文摘要: |
| Time reversal is an unique self-adaptive focusing technique important to ultrasonic imaging. In this paper, the principle and the analytic expression of the ultrasound field in the realization of time reversal during the presence of an interface between two media are presented. Experimental results of time reversal are given and found to agree with theoretical ones. |
| DOI：10.11684/j.issn.1000-310X.1999.03.001 |
| 中文关键词: 时间反转 自适应聚焦 存在界面 超声成像 |
| 英文关键词: : Time reversal Self-adaptive focusing Presence of an interface Ultrasonic imaging |
| 基金项目:国家自然科学基金;声学所所长基金 |
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