optical fog光学灰雾opticaladj.视觉的；光学的optical tapping element光分路器optical peephole device光学窥视装置optical fiber line code光纤线路码型optical waveguide laser光波导激光器optical pressure sensor光学压力传感器optical waveguide fiber光波导纤维optical axis of crystal晶体光轴optical assembly errors光学拼接误差optical fiber isolation光纤隔离optical pulse generator光脉冲发生器