Authors

Nazim Bharmal

Affiliations

CfAI, Durham University

Abstract

Imaging enhancement is common in microscopy and LIDARs are used extensively in meteorology. The lessons learnt from these two disciplines in regard to AO, with emphasis on ELT-scale adaptation, is discussed. Several particular themes are explored in detail: resolution enhancement of laser guide stars in order to enhance spatial coherence; homodyne detection of Shack-Hartmann images for attaining (optically) fast, variable gain; and guide star backscatter from below their focus for in-situ turbulence profiling with high spatial resolution.