![GRAVITY's wavefront sensor and adaptive optics system GRAVITY's wavefront sensor and adaptive optics system](/4637579/header_image-1529327063.jpg?t=eyJ3aWR0aCI6ODQ4LCJmaWxlX2V4dGVuc2lvbiI6ImpwZyIsIm9ial9pZCI6NDYzNzU3OX0%3D--5eead9fb5155c578199599b0a9e3ba19296527ab)
GRAVITY's wavefront sensor and adaptive optics system
The wavefront sensor of GRAVITY will be of Shack-Hartmann-type using a lenslet mask with 9x9 micro-lenses. It will be sensitive in the spectral range between 1.4 and 2.4 microns.
The AO system of GRAVITY uses the existing MACAO deformable mirrors installed at the VLTI. The real-time computers will be based on the SPART-light platform designed by ESO.
Dedicated interferometric algorithms will be used to avoid unwanted disturbances. This includes deformable mirror saturation management, anti-windup, and piston control. Vibration tracking will be imlemented as well.
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