|
Focused ultrasound transducer is widely used in medical treatment instruments and equipment, which can achieve the purpose of tumor ablation through thermal, cavitation and mechanical effects under high power and high sound intensity conditions, and precisely destroy the target tissues. The optical method based on laser interference technology has the characteristics of high precision, high resolution and high measurement efficiency for the measurement of acoustic field characteristics of the focusing transducer, while avoiding the disadvantages of hydrophone measurement under high sound intensity conditions. In this paper, the influence of the transmissive reflective film on the acoustic transmission is theoretically deduced, and the influence of the transmissive reflective film on the focal position of the focusing transducer is confirmed. Experiments are conducted to investigate the change of acoustic pressure of the transmissive reflective film on the focus of the focusing transducer at different power conditions and different positions of the focusing transducer
|
