Phase diversity is a phase-retrieval algorithm that uses a pair of defocused intensity images taken symmetrically about the wavefront to be determined. Generalised phase diversity is a phase-retrieval algorithm that uses diversity functions other than defocus. The approach adopted assumes that unknown phase changes satisfy the small-angle approximation over spatial regions that can be selected by choice of the diversity function. For smooth functions, and for discontinuous functions with only small discontinuities, this leads to a very simple analytic solution. Computer simulations were used to validate this method for the retrieved phase.
|Proceedings of SPIE - the International Society for Optical Engineering
|Published - 2005
|5th International Workshop on Adaptive Optics for Industry and Medicine - Beijing, China
Duration: 29 Aug 2005 → 1 Sept 2005
- Generalised Phase Diversity
- Phase Retrieval
- Small Angle Expansion