acoustic lens

Based on the Helmholtz integral with the Kirchhoff approximation, the signal receiving model of acoustic lens and the acoustic scattering model of the target have been made, and stationary phase method is used to evaluate the scattering wave.

论文基于Helmholtz积分，利用Kirchhoff近似建立了声学镜头接收信号模型和目标散射声模型，并采用稳定相位法计算目标散射声。

A Primary Study On The Optimum Design For Acoustic Focusing Conical Lens

圆锥形凹面聚束声透镜优化设计的初步研究

Rayleigh-Sommerfeld Diffraction Formula on the Thin Acoustic Lens With Larger Aperture

较大孔径薄声透镜声场的瑞利&索末菲衍射公式

Acoustic lens designing is a key technology on lens imaging sonar. Firstly the paper introduces the design principle of the lens in detail.

透镜设计是透镜成像的关键技术，本文系统介绍了声透镜的设计原理。

Results and Conclusions: Our simulations show that in order to improve the focal shape, the outer diameter of the annulus must be as large but the radius of acoustic lens must be as small as possible.

结果与结论：为了改善椭球焦域长短轴之比，环状外径应尽量取大，声透镜半径应尽量取小；

Studies on Acoustic Lens Imaging of Photoacoustic Signal

光声信号的声透镜层析成像研究

The most pivotal technique is focalizing technique in HIFU technique. At present, self-focused 、 ultrasound phased array 、 acoustic lens and so on are in common use.

HIFU技术中最为关键的技术是聚焦技术，目前所采用的聚焦方式主要有：自聚焦、超声相控阵列聚焦、声透镜聚焦等。

It has put forward a imaging method of acoustic lens using photoacoustic signal and according to the Kirchhoff diffraction theory we deduced pulse response of acoustic lens.

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。

It was shown that using polystyrene as wedge material, high polymer as transducer material and curved wedge as an acoustic lens was the key point of application effectiveness for phased array system.

为保证相控阵探头在主要特性上等效于普通斜探头，用聚苯乙烯作楔块材料，用高分子聚合物作换能器材料，并用曲面声透镜改善探头在管子轴向和周向的声束特性。

Al. had got 3-D real-time optoacoustic image with much higher optical contrast and ultrasonic resolution by using an acoustic lens system and CCD system.

Frenz等人也利用声透镜结合CCD成像方法实现了对光声信号的实时三维成像，并且获得的光声图像对比度和灵敏度都比较高。

Many ultrasonic treatment systems produced by The Chongqing HIFU Company are acoustic lens focus system.

重庆海扶公司生产的许多超声治疗系统，都采用的是声透镜聚焦系统。

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.

Simulation research on acoustic lens beamforming

声透镜波束形成技术仿真研究

The acoustic lens focus system has many strong points, such as: ease of operation, structure simple, diverse shape and cheap of sound material and widely applied in the clinical medicine.

声透镜聚焦系统由于其操作方便、结构简单、形状多样、折声材料便宜等方面的优点而在临床医学中被广泛应用。

Now, focus transducers have three kinds of types: Focus transducer, acoustic lens, phased array focusing system.

到目前为止可以实现聚焦的换能器有三种类型：聚焦换能器、声透镜、相控阵聚焦系统。

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。

By using complex amplitude to describe sound field distributing, acoustic lens pulse response is deduced in theory, and function imaging of biological tissue is obtained.

以声场复振幅来描述声场分布，根据基尔霍夫衍射理论，从理论上推导了声透镜的脉冲响应，并通过实验得到了生物组织的功能成像。

Designed acoustic imaging system, it is demonstrated that using acoustic lens imaging is feasible through measuring these sound fields distributing of single dot body and three dots body.

设计声成像实验系统，对已知声场中的单点物及同一面上三点物经声透镜变换后的声场分布进行了测量，证实了声透镜成像的可行性。