Focus detection by shearing interference of vortex beams for non-imaging systems

5 years ago

Focus detection by shearing interference of vortex beams for non-imaging systems

Shichao Zhan, Xiongfeng Li, Yiyong Liang

In focus detection of non-imaging systems, the common image-based methods are not available. Also, interference techniques are seldom used because only the degree with hardly any direction of defocus can be derived from the fringe spacing. In this paper, we propose a vortex-beam-based shearing ...

Publisher URL: http://www.osapublishing.org/abstract.cfm

DOI: ao-57-5-1037

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