A correction is given for the statement after Eq. (7) [J. Opt. Soc. Am. A 33, 1836 (2016) [CrossRef] ].
© 2016 Optical Society of America
In paper , the statement after Eq. (7) should be “where is the diffraction order, and is the grating frequency and can be regarded as the reciprocal of the grating constant.” However, in the discussion section, still represents the grating constant.
1. S. Fu, T. Wang, and C. Gao, “Perfect optical vortex array with controllable diffraction order and topological charge,” J. Opt. Soc. Am. A 33, 1836–1842 (2016). [CrossRef]