Photovoltaic and optical device (A) allowing to be both transparent to a part of the solar spectrum and to transform into electrical energy the other part of the solar spectrum, with little loss of light. The device (A) makes it possible to filter the sunlight in order to optimize crop production yields (5) by choosing colors suitable for photosynthesis, and secondly to produce photovoltaic electrical energy from the other part of the solar spectrum which is not or little used by plants (5). The device (A) is composed of a plurality of flat photovoltaic surfaces (51, 52, 53) arranged parallel to each other, the active face of one facing the nonactive side of the other, characterized in that the active face of said photovoltaic surfaces is covered with a dichroic mirror filter (41,42,43) and the non-active surface of said photovoltaic surfaces is covered with a mirror-like reflective surface (61,62,63) , so that the light which illuminates said photovoltaic device (71,81), whatever its angle of incidence, is divided on the one hand into a part (72,84) of the light spectrum which is reflected by said dichroic mirror filters and springing from said device (84, 74) optionally before or after reflection on said mirror-like reflective surfaces (61, 62, 63) and sharing elsewhere in another portion of the light spectrum (73, 83) passing through the dichroic mirror filters (41,42,43) and t absorbed and converted into electricity by said photovoltaic surfaces (51,52,53). Dispositif photovoltaïque et optique (A) permettant d'être à la fois transparente à une partie du spectre solaire et de transformer en énergie électrique l'autre partie du spectre solaire, avec peu de perte de lumière. Le dispositif (A) permet de filtrer la lumière solaire afin d'optimiser les rendements de production des cultures (5) par le choix de couleurs adaptées à la photosynthèse, et d'autre part de produire de l'énergie électrique photovoltaïque à partir de l'autre partie du spectre solaire q
