Fig. 1. Formation mechanism and correction scheme of thin tube laser ring-domain aberration. (a) Formation mechanism; (b) correction scheme

Fig. 2. Model of ring-shaped edge-driven deformable mirror and arrangement of driver and sub-aperture. (a) Arrangement of actuators; (b) front of deformable mirror; (c) side of deformable mirror; (d) arrangement of SHWS sub-aperture

Fig. 3. Distribution of influence functions of different drivers. (a) Inner ring driver; (b) outer ring driver

Fig. 4. Correct surface shapes and fitting residuals. (a) Correct defocus surface shape; (b) correct astigmatic surface shape; (c) correct coma surface shape; (d) defocus residual; (e) astigmatic residual; (f) comatic residual

Fig. 5. Schematic of laser ring aberration correction for large obstruction ratio thin tube

Fig. 6. Distortion wavefront distribution of thin tube laser. (a) Initial wavefront; (b) wavefront after tilting

Fig. 7. Thin tube laser wavefront correction and far-field light intensity distribution. (a) Corrected wave front shape; (b) wavefront fitting residual; (c) light intensity distribution before correction; (d) light intensity distribution after correction

Fig. 8. Mirror strain and stress distribution. (a) Deformation distribution; (b) stress distribution

Fig. 9. Correction effect of 32-unit ring-shaped edge-driven deformable mirror. (a) Wavefront fitting residual; (b) light intensity distribution after correction