日本东京大学人工脏器移植研究部门和欧林巴斯光学工业公司联合研制出一种新式的超声显微镜。该显微镜装置主要由高频脉冲发生器、循环器、压电换能器和声透镜等组成。首先由高频脉冲发生器通过循环器将激励电压加到声透镜的压电换能器上,使之产生与高频脉冲同频率的超声波。然后用声透镜将超声波集中在样品一微小点上。从样品反射的回 Tokyo, Japan, Department of Artificial Organ Transplant Research and Olympus Optical Industry jointly developed a new type of ultrasound microscope. The microscope device is mainly composed of high-frequency pulse generator, circulator, piezoelectric transducer and acoustic lens. First, the excitation voltage is applied to the piezoelectric transducer of the acoustic lens by the high-frequency pulse generator through the circulator to generate the ultrasonic wave with the same frequency as the high-frequency pulse. Then use the acoustic lens to focus the ultrasound on a small spot on the sample. Reflected from the sample back