Aberration correction ability of bimorph deformable mirror

The impacts of effective aperture size and beam incident angle on the aberration correction ability of a 20-actuator bimorph deformable mirror whose clear aperture is 30 mm are numerically analyzed based on measured influence functions. Numerical simulations show that, when the effective aperture is 16 mm, the deformable mirror can correct aberrations well. The increase in the beam incident angle lowers both the correction accuracy and amplitude. However, if the incident angle is limited within 25, the impact of beam incident angle is not obvious.