We present an erratum to correct the x, z labels in Figs. 6 and 7 from Adv. Opt. Photon. 10, 484 (2018) [CrossRef] .
© 2021 Optical Society of America
Figures 6 and 7 (Figs. 1 and 2 in this erratum) in  had the x axis and the z axis switched. This erratum presents the correct labels for these figures. The mislabeling did not affect the results of the original paper; neither does it affect the discussion. We thank David Hoffman for pointing out this mistake.
1. R. Winston, L. Jiang, and M. Ricketts, “Nonimaging optics: a tutorial,” Adv. Opt. Photon. 10, 484–511 (2018). [CrossRef]