Method for determining the difference in piston and tilt existing between a wavefront sensor and several light beams

摘要

The wavefront analyzer is improved to easily determine the difference in amplitude and tilt that can exist between different regions of the initial wavefront (S0). To achieve this, interference between only two waves is generated from a plurality of beams (F1, F2) coming from adjacent regions in the initial wavefront. Such an analyzer can be used to coherently couple laser lines produced by different sources arranged in parallel. Another application is for determining the height and tilt differences that exist between adjacent mirror portions of the Keck telescope.