LIGHT CONDENSATION OPTICAL ELEMENT, LIGHT CONDENSATION DEVICE, AND PHOTOVOLTAIC POWER GENERATION DEVICE

PROBLEM TO BE SOLVED: To provide new light condensation means that can efficiently use light energy.SOLUTION: A light condensation optical element 10 is composed of an (A) member 11 having optical transparency and a particulate (B) member 12 having optical transparency and dispersed in the (A) member 11. When a wavelength of incident light is denoted by λ, the particle size of the (B) member is 0.1 λ to 10 λ. When light refraction index along an X axis in an electric field amplitude is denoted by nand light refraction index along a Y axis in an electric field amplitude is denoted by nin the (A) member 11, and light refraction index along an X axis in an electric field amplitude is denoted by nand light refraction index along a Y axis in an electric field amplitude is denoted by the nin the (B) member 12, the light condensation optical element 10 is so configured that the nand the nare different and the nand the nare significantly the same.