Fig. 1. Schematic diagram of an optical signal injection based testing

Fig. 2. Target trajectory with injection error

Fig. 3. Time sequences of CCD camera， image processor and servo system

Fig. 4. Time sequences of no-delay optical signal injection

Fig. 5. Schematic diagram of video signal injection testing process

Fig. 6. Angles of theodolite optical axis and tracking target

Fig. 7. Tracking error of theodolite with video signal injection

Fig. 8. Tracking error and injection error of theodolite with different delays