Spherical refractive correction with an electro-optical liquid lens in a double-pass systemF. Sanàbria, F. Díaz-Doutón, M. Aldaba and J. PujolJ. Eur. Opt. Soc.-Rapid Publ., 8 (2013) 13062DOI: https://doi.org/10.2971/jeos.2013.13062