THE receipt of a paper by Prof. H. Lamb, “On Wave Propagation in Two Dimensions” (Proc. Lond. Math. Soc., vol. xxxv. p. 141), stimulates me to publish now a condensation of a portion of a work which ...
These images illustrate the performance between the aspheric and progressive mirror (top) and the flat and progressive mirror (bottom). In (a), the standard aspheric mirror is shown with a blue line ...