optical gyro光学陀螺opticaladj.视觉的；光学的optical emission spectrography发射光谱学optical time domain reflection光时域反射optical remote sensing imaging光学遥感成像optical projection lithography光学投影蚀刻Optical Measurement Instrument光学测量仪器Optical information technology光信息技术optical transmission equipment光传输设备optical-communication system光纤通信系统optical submarine cable system光学海底电缆系统optical interferometric method光干涉法