Filled liquid lens and method for ultrasonic focusing

The invention provides a filling type liquid lens and method for ultrasonic focusing, and relates to the technical field of acoustic devices. According to the liquid lens, a cylindrical closed cavity is divided into an upper cavity and a lower cavity through an elastic film, the upper cavity and the lower cavity are filled with two liquid materials with the same density respectively, and the volumes of the liquid materials in the upper cavity and the lower cavity are adjusted in a coordinated mode through two linear electric cylinders connected with each other. Focusing of the liquid lens is achieved by changing the curvature radius of the elastic film. The technical scheme has the advantages of high dynamic focusing speed, simplicity in operation, low driving power consumption, large zooming range, flexible lens aperture size and easiness in application in an ultrasonic field. 本发明提供了一种用于超声聚焦的填充式液体透镜及方法，涉及声学器件技术领域。该液体透镜利用弹性薄膜将圆柱形封闭腔体分隔为上、下腔体，并分别在上、下腔体中填充密度相等的两种液体材料，通过彼此连接的两个直线型电缸协调调节上、下腔体中液体材料的体积，以通过改变弹性薄膜曲率半