optical fog光学灰雾opticaladj.视觉的；光学的optical scanning system光学扫描系统optical layer multieast光层组播optical frequency hands光频段optically active carbon旋光碳原子Optical Solar Reflector太阳光反射器optical flow smoothness光流场平滑性准则optical potential model光势能模型optical angular encoder光栅角编码器optical current sensors光学电流传感器optical display plotter光显示绘图仪