  High-contrast imaging and spectroscopy provide unique constraints for
exoplanet formation models as well as for planetary atmosphere models.
Instrumentation techniques in this field have greatly improved over the last
two decades, with the development of stellar coronagraphy, in parallel with
specific methods of wavefront sensing and control. Next generation space- and
ground-based telescopes will allow the characterization cold solar-system like
planets for the first time and maybe even in situ detection of bio-markers.
However, the growth of primary mirror diameters, necessary for these detection,
comes with an increase of their complexity (segmentation, secondary mirror
features). These discontinuities in the aperture can greatly limit the
performance of coronagraphic instruments. In this context, we introduced a new
technique, Active Correction of Aperture Discontinuities - Optimized Stroke
Minimization (ACAD-OSM), to correct for the diffractive effects of aperture
discontinuities in the final image plane of a coronagraph, using deformable
mirrors. In this paper, we present several tools that can be used to optimize
the performance of this technique for its application to future large missions.
In particular, we analyze the influence of the deformable setup (size and
separating distance) and found that there is an optimal point for this setup,
optimizing the performance of the instrument in contrast and throughput while
minimizing the strokes applied to the deformable mirrors. These results will
help us design future coronagraphic instruments to obtain the best performance.
