optical device

详细解释:【电】 光学装置

英语解释：

名词 optical device:

a device for producing or controlling light

例句：

An optical device designed to project images of atmospheric phenomena, such as clouds, on the inside of a dome.气象仪将大气现象的映像，如云，投射到一个圆顶内侧的一种光学装置