Four parts are included: acoustic lens, mechanics I electronic circuitsand microcomputer system. 声显微镜由声镜、机械部件、电路和微机软硬件组成。
It has put forward a imaging method of acoustic lens using photoacoustic signal and according to the Kirchhoff diffraction theory we deduce. 主要内容：1．光声信号声透镜层析成像方法的提出，并依基耳霍夫衍射理论推导了声透镜的脉冲响应。
The paper focuses on the immersion line-focusing ultrasonic transducer with cylinder curved acoustic lens used in intelligent pig,establishes a mathematical model of acoustic fields,calculates its acoustic field distribution and focal length. 论文针对智能猪用柱形曲面声透镜水浸式线聚焦探头,建立了其声场模型,并对其轴线声场和焦距进行了数值模拟。
Acoustical lenses are used commonly for contour correction. When scanning the inside of a pipe section by the immersion method, which of the following lens types would be used? 声透镜常用来修正声束形状，用液浸法从管子内壁进行探伤时，应使用哪咱类型的透镜？
Have your glasses got plastic lenses? 你的眼镜是用塑胶镜片的吗?