This erratum corrects minor errors in the paper. |
This letter [Optical Engineering, 59(7), 070503 (2020) DOI: 10.1117/1.OE.59.7.070503] was originally published on 24 July 2020 with an error in Eq. (4). The incorrect equation appeared as: The corrected equation appears as: Also, in the first paragraph in Sec. 3.1, the conditions on imaginary part of were incorrectly stated. The correct conditions are in the CTF and in the isotropic dielectric material. These errors were not present in the computations and all results in the letter remain correct. The paper was corrected on 24 June 2021. |