Two typing errors in our manuscript are reported and corrected.
© 2012 OSA
There are two typing errors in our paper . First, the Sparrow resolution criterion we stated in our paper is the Sparrow criterion for points in the coherent case. The Sparrow criterion for lines in the coherent case, which applies in our case, is given by 
Second, on the right-hand side of Eq. (8), the factor 2z has been accidently written twice. The correct equation is as follows:
The authors regret the errors, which do not affect any of the results or conclusions presented in .
References and links
2. H. Gross, H. Zügge, M. Peschka, and F. Blechinger, Handbook of Optical Systems (Wiley-VCH, 2007), Vol. 3.