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In this erratum, an error in Eq. (14) in our recently published Letter [Opt. Lett. 41, 4951 (2016) [CrossRef] ] is corrected.
© 2017 Optical Society of America
We omitted a scale factor in Eq. (14) in our recently published letter (Ref. [1]). Equation (14) should be revised to be:
where is the pixel size of the used camera.Although Eq. (14) was not correctly presented in Ref. [1], all the data in that letter were processed with the right equation. Therefore, this correction does not change any of the results in Ref. [1].
Funding
National Natural Science Foundation of China (NSFC) (61575157).
REFERENCE
1. H. Zhao, C. Zhang, C. Zhou, K. Jiang, and M. Fang, Opt. Lett. 41, 4951 (2016). [CrossRef]