Proceedings PaperQuasi-geometrical model of partially coherent beam propagation in real axially symmetric optical systems
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It is proposed to estimate lens quality for multi mode beam transformation by factor Q as a ratio of output to input beam parameter M2. The quasi geometrical method of M2 calculation is presented, and several examples are discussed. It is shown that for high M2 beams, the requirements on lens quality are considerably lower than for diffraction limited systems.