科学技术总是在不断进步,弥补着人类听觉、视觉的不足.人类发现了超声,发明了超声发射装置,最终发展到超声成像,能看到人体的内部.同样,人类发现了不可见光,如红外线、紫外线,最终也发明了红外线成像装置,能看到人或动物的体表甚至能看到体内.夜视原理夜视仪就是专门用来在夜间观看物体的.它的原理是红外线成像.夜视仪分两种.被动式和主动式.被 Science and technology are always in progress to make up for human hearing, visual shortcomings.Human found the ultrasound, invented the ultrasound launcher, eventually developed into the ultrasound imaging, can see the inside of the human body.Also, humans found invisible light, such as Infrared, ultraviolet, and ultimately also invented the infrared imaging device, you can see the human or animal body surface can even see the body. Night vision principle Night vision is designed to watch objects at night and its principle is infrared imaging. Night vision is divided into two types. Passive and active