Optical UNI光用户网络接口opticaladj.视觉的；光学的optical particle counter光学粒子计数器optical horizon distance光学地平线距离； 视距optical density of smoke烟的密度<烟的阻光度的量度optical waveguide switch光波导开关optical image encrypting光学图像加密optical maser wavelength激光波长optical signal processor光学信号处理机optical adaptive control最佳适配控制optical fiber technology光纤技术optical distortion value光学畸变距离