Separation of atmospheric layers

Erez N. Ribak, Arne L. Ardeberg, Torben Andersen
2004 Second Backaskog Workshop on Extremely Large Telescopes  
In between the star-oriented tomographic measurement of atmospheric layers, and the pure layeroriented one, there is a simple third option, which measures the turbulence in the layers' images proper by a Hartmann-Shack type sensor. The wide field is achieved by looking at multiple stars in each lenslet. The method is simple to use, but requires a fast, sensitive camera with many pixels for the lenslets' wide fields. Most of the empty pixels (without stellar images) are skipped during read-out.
doi:10.1117/12.566295 fatcat:2spigwpwxzh7nla7mkmtq2nsja