New developments using holographic concentration in solar photochemical reactors J. Ortner, D. Faust, K.-H. Funken, T. Lindner, J. Schulat, C. G. Stojanoff et P. FröningJ. Phys. IV France, 09 PR3 (1999) Pr3-379-Pr3-383DOI: https://doi.org/10.1051/jp4:1999359