This article [Opt. Eng. 51, 058001 (2012)] was originally published on 2 May 2012 with an error on p. 7, under Eq. (23).
The sentence beginning “In comparison with the same dependence of spectral selectivity…” contains an inline equation, which was corrected from to .
All versions of this article were corrected online on 8 May 2012. It appears correctly in print.