optical fit光学符合opticaladj.视觉的；光学的optical-mode fraquency光(学)模(式)频率optical digital receiver光数字接收机optical-mode frequency光模频率Optical lithography mask光刻掩模optical radiation effect核爆炸次声波效optical splitting system分光系统optical fiber connecting光纤对接optical cross-connects光交叉连接Optical fibre and raster光纤光栅optical cross connection光交叉连接