This erratum corrects an error related to an equation.
Equation (26) in this article [Opt. Eng. 59(5), 055103 (2020) doi: 10.1117/1.OE.59.5.055103] was incorrect and unnecessary to the explanation of results in the originally published paper. The equation has been removed and the paper republished.
All versions of the paper were corrected on 25 June 2020.