optical arm光学臂opticaladj.视觉的；光学的optical radial table光学转台optical film monitor光学薄膜监测器optical sound talkie光电式有声电影Optical Rotary Power旋光本领optical density disk光密度片optical relief model光学立体模型Optical fiber lasers光纤激光器optical link segment光连接段optical permittivity[化] 光电容率optical distribution光场分布