dark image meaning in Chinese

暗像
暗象

At last , we illustrate the imaging process of nonlinear medium by numerical simulation , and the image position and intensity are studied . at the same time , it is pointed out that a piece of nonlinear medium and high power laser beam can form a hologram system . for the first time , we found that a " dark image " ( or " cold image " ) may emerge along with a " hot image "
最后，我们研究了“热像”的形成机理及其规律，用数值模拟的方法形象地说明了非线性介质的成像作用，提出了用非线性介质和高功率激光形成全息成像系统的概念和思路，丰富了“全息成像”内涵，同时，首次发现了亮像和暗像同时并存的现象。