Xiang LI, Dongyu WU, Ziting SUN, Liang GAO, Yan AN, Yansong SONG, Keyan DONG. Study of optical antenna image quality under high-power laser irradiation[J]. Infrared and Laser Engineering, 2024, 53(8): 20240187

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- Infrared and Laser Engineering
- Vol. 53, Issue 8, 20240187 (2024)

Fig. 1. Structure diagram of an off-axis two-mirror optical antenna

Fig. 2. Mesh model of an off-axis two-mirror optical antenna

Fig. 3. Coordinate system setup for analytical modeling of off-axis two-mirror optical antenna

Fig. 4. Temperature field distribution of primary and secondary mirrors

Fig. 5. Primary and secondary mirrors and displacement clouds of the system

Fig. 6. The displacement value of the primary and secondary mirror. (a) The displacement value of the primary mirror; (b) The displacement value of the secondary mirror

Fig. 7. Comparison plot of the Zernike polynomial coefficient values before and after removing the displacement of the primary and secondary mirrors

Fig. 8. The curves of Zernike coefficient values and wavefront. (a) Zernike factor of the primary mirror;(b) Zernike factor of the secondary mirror; (c) Zernike factor of the antenna;(d) The wavefront RMS and PV of antenna

Fig. 9. Wavefront aberration diagram of an off-axis dual-reflector optical antenna under the action of a 10 W laser for 30 minutes

Fig. 10. Field diagram of equivalence experiment. (a) Measurement of antenna wavefront aberration at room temperature of 19 ℃; (b) Measurement of antenna wavefront aberration after loading a 10 W laser

Fig. 11. Comparison of simulation and experimental results

Fig. 12. Comparison of wavefront aberrations in the antenna before and after loading with a 10 W laser. (a) Wavefront aberration of the antenna measured before laser loading; (b) Wavefront aberration of the measured antenna after loading a 10 W laser for 30 minutes
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Table 1. Physical parameters of some materials
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Table 2. The Z -axis (optical axis) displacement value of the lens surface under a transient thermal load of 1 000 W
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Table 3. Correlations between Fringe Zernike polynomials and Sediel aberrations
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Table 4. The changes in wavefront aberrations of the experimental antenna over time

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