Focal plane wavefront sensor achromatization: The multireference self-coherent camera J. R. Delorme, R. Galicher, P. Baudoz, G. Rousset, J. Mazoyer and O. Dupuis A&A, 588 (2016) A136 Published online: 31 March 2016 DOI: 10.1051/0004-6361/201527657