Fig. 1. Schematic diagrams of structure and working principle of varifocal lens with aberration correction function. (a) Structural diagram of varifocal lens; (b) working principle of actuator; (c) process of compensating aberration by varifocal lens

Fig. 2. Varifocal lens with aberration correction function. (a) Physical drawing of varifocal lens; (b) images in aperture of varifocal lens at different focal lengths

Fig. 3. Schematic diagram of experimental system

Fig. 4. Reconstructed Zernike polynomial aberrations. (a) Z₃; (b) Z₄; (c) Z₅; (d) Z₆; (e) Z₇; (f) Z₈; (g) Z₉

Fig. 5. Wavefront aberration comparison before and after aberration compensation. (a) Wavefront aberrations under different refractive powers; (b) Zernike polynomial coefficient decomposition of wavefront at refractive power of 1 D

Fig. 6. Intensity distribution of focal spot under different refractive powers. (a1)(b1) 0; (a2)(b2) 1 D; (a3)(b3) 2 D; (a4)(b4) 3 D