Fig. 1. One-to-many laser communication antenna system. (a) Antenna; (b) two-axis tilt-mirror assembly

Fig. 2. Integrated tilt-mirror assembly. (a) Model of tilt-mirror; (b) assembly drawing of components; (c) tilt-mirror; (d) mounting seat

Fig. 3. Installation structure of tilt-mirror. (a) Layout of installation points; (b) simplified model of installation points

Fig. 4. Surface shape changes of different mounting points. (a) Point A; (b) point B; (c) point C; (d) surface shape change under 5 ℃ temperature rise(drop); (e) surface shape change in free state; (f) surface shape change when the screw is tightened; (g) surface shape change when the point A is loose; (h) surface shape change imitates when the point B is loose; (i) surface shape change when the point C is loose

Fig. 5. Schematic diagram of isolation tank

Fig. 6. Physical and surface change of the tilt-mirror after optimization. (a) Tilt-mirror; (b) two-axis tilt-mirror assembly; (c) surface change when point A sinks; (d) surface change when temperature rises (drops) at 5 ℃

Fig. 7. Test results of surface shape. (a) Test device of surface shape; (b) surface shape in free state; (c) surface shape when screw is tightened; (d) surface shape at 5 ℃ temperature rise (drop)

Fig. 8. Demonstration system of one-to-many laser communication. (a) One-to-many laser communication antenna; (b) demonstration site

Fig. 9. Precision tracking spot and analysis results