超声显象是一种独特的成象形式,其成象的原理,有许多来自光学成象的技术。声学理论告诉人们,从物体散射出来的声波,如同散射的光波一样,携带着许多象的信息。施利伦(Schlieren)法显象系统的特点,在于实验设备简单,图象清晰直观,它不需要复杂的特殊处理就能成象。同时,施利伦法与全息系统的成象方法,也有明显的区别:它不需要声参考波束,或以它的 Ultrasound imaging is a unique form of imaging, the principle of imaging, there are many from optical imaging technology. Acoustic theory tells people that sound waves scattered from objects, like scattered light waves, carry many images of information. Schlieren method imaging system is characterized by simple experimental equipment, clear and intuitive images, it does not require complex special treatment can be imaged. In the meantime, there is also a clear difference between Shilian’s method and the holographic system’s imaging method: it does not require an acoustic reference beam or uses its