optical fit光学符合opticaladj.视觉的；光学的optical project perimete光学投射视野计optical scale theodolite光学刻度经纬仪optical antenna aperture光学天线孔径optical scanner bar code光学扫描器条码optical plummet centring光学垂线对中optical inversion system光学转像系统,光学转象系统optical bistable element光学双稳态元件optical beam propagation光束传播optical radiation safety光辐射安全optical data recognition光学数据识别