We present linear conjugated combined aberration modes with a concentric pupil diameter of 4 mm. The combinations are according to the coupling relationship between Zernike modes over the concentric circle domain within the unit circle and the root mean square decreasing amplitude ratio of the corresponding aberration modes in the concentric pupil, in which the reconstruction pupil diameter is 6 mm. Each combined mode shares the characters of 2 radial orders apart, the same azimuth frequency, the same coefficient sign, and the prescribed amount, such as (C<sub>2</sub><sup>0</sup> = 0.7λ, C<sub>4</sub><sup>0</sup> = 0.3λ), (C<sub>3</sub><sup>-3</sup> = 0.8λ, C<sub>5</sub><sup>-3</sup> = 0.3λ), and so on. We also analyze the influence of the combined modes on optical quality. Simulations and experiments show improvement after combination; they also indicate that the influence of conjugated combination on optical quality has compensation and not superposition.
© 2013 Chinese Optics LettersPDF Article