Method for the design of nonaxially symmetric optical systems using free-form surfaces (Erratum)

Abstract

We made an error of scale in section six of our paper [Opt. Eng., 57(10), 101704 (2018). doi: https://doi.org/10.1117/1.OE.57.10.101704] that resulted in an inappropriate comparison. After properly scaling and optimizing our three mirror telescope design the averaged over the field RMS spot size is 10.4 μm and this represents an improvement of about 26% and not of 40%. We find that the Zf(r) surfaces, the XY polynomial surfaces, and the NURBS surfaces are able to model the mirror system with similar RMS spot size performance.