Nemeş George
J Opt Soc Am A Opt Image Sci Vis. 2022 Apr 1;39(4):667-671. doi: 10.1364/JOSAA.435756.
The inadequacy of using beam propagation factors 2, 2 for general astigmatic beams as those analyzed in the paper J. Opt. Soc. Am. A37, 89 (2020)JOAOD60740-323210.1364/JOSAA.37.000089 is discussed, and the appropriate beam invariants to be considered are presented.