Tomographic phase diversity for non-common path ... - AO4ELT 2

Motivations
Wide field AO systems require dedicated methods for
non-common path aberration (NCPA) correction to
cancel aberrations simultaneously over the entire FoV
Use a focal-based approach:
optimize image where it needs to be optimized
easy to acquire many measurement points simultaneously
saves hardware
Leverage Phase Diversity (PD), a known and proven
technique (Paxman et al 1982, Blanc et al 2003,
Hartung et al 2003)
On cal source: simplified PD, straightforward object
Kolb (2006): wide field capable but not intrinsically
tomographic
OSA, AO Session, Toronto, July 10-14, 2011
Wednesday, 28 September 11
2