optical dye荧光染料opticaladj.视觉的；光学的optical transfer network光传输网络optical coupling element光耦合元素optical flow computation光流计算optical switching fabric光交换结构optically thinner medium光疏介质optical videodisc player光学视盘放象机optical breakdown in air空气击穿optical eye level finder光学直视水平瞄准器optical power supervisor光功率监测optical disc autochanger光碟自动换盘机