We report a high fidelity (>90%) approximation of radial polarization conversion using a birefringent lens. It offers the advantages of low-cost, easy fabrication, alignment robustness and high laser power handling capability.
@article{arxiv.0710.2827,
title = {A high fidelity approximation of radial polarization conversion},
author = {P. B. Phua and W. J. Lai and Yuan Liang Lim},
journal= {arXiv preprint arXiv:0710.2827},
year = {2007}
}