optical sag视光垂度opticaladj.视觉的；光学的optical fibre monitor光纤监控器optical loss test set光损耗测试仪optical fiber sensing光纤传感Optical Angle Readout光学角度读出optical fiber sensors光纤传感器optical ablation zone光学切削区optical stylus method光针法optical pulse counter光脉冲计数器optical front pointer光学前方指针optical analog method光学模拟法