  The past decade has seen a significant growth in research targeted at space
based observatories for imaging exo-solar planets. The challenge is in
designing an imaging system for high-contrast. Even with a perfect coronagraph
that modifies the point spread function to achieve high-contrast, wavefront
sensing and control is needed to correct the errors in the optics and generate
a "dark hole". The high-contrast imaging laboratory at Princeton University is
equipped with two Boston Micromachines Kilo-DMs. We review here an algorithm
designed to achieve high-contrast on both sides of the image plane while
minimizing the stroke necessary from each deformable mirror (DM). This
algorithm uses the first DM to correct for amplitude aberrations and the second
DM to create a flat wavefront in the pupil plane. We then show the first
results obtained at Princeton with this correction algorithm, and we
demonstrate a symmetric dark hole in monochromatic light.
