反射物 meaning in Chinese

reflecting object
reflector

( 7 ) numerical reconstruction of phase of light wavefront by perfect beam reflected by an imperfect mirror in digital hologram by ccd capturing . chai xiaodong ( the key laboratory of intelligent computing and signal processing , ministry of education )
7 、对ccd获取的镜面反射物波波阵面的干涉全息图，数字重构了其波阵面相位并给出了算法。
Since the distance from any given radar to each of these reflective surfaces ( which may be as much as 50km , or 30 miles , away ) is known precisely , the time it takes a beam to get there and back is a measure of how much water vapour it contains
因为可以精确获取某一雷达到这些反射物体中的任一表面的距离（可能有50公里，即30英里远），人们便可以通过雷达波往返两地所需的时间测得反射物的水蒸气含量。