Patent ID: 8776783

Claim:
A solar energy collector of comprising: a frustoconical reflective shell comprising a top opening and an opposite bottom opening, the reflective shell tapering from the top opening to the bottom opening, the reflective shell configured for reflecting light; and a light converging lens arranged at the top opening and fixed on the side wall of the reflective shell, the light converging lens comprising: a central lens portion, the central lens portion comprising a first light incident portion and an opposite first light output portion, the first light incident portion comprising a plurality of concentric annular prisms cooperatively forming a Fresnel-lens structure, the first light incident portion facing away from the bottom opening, and a periphery lens portion surrounding the central lens portion, the periphery lens portion comprising a second light incident portion and an opposite second light output portion, the second light incident portion adjacent to the first light incident portion and facing away from the bottom opening, the second light incident portion being convex, the periphery lens portion being inclined downwardly from the central lens portion toward the bottom opening; wherein the first light incident portion comprises a convex micro-lens at the center thereof, the plurality of concentric annular prisms surrounds the micro-lens to form the Fresnel-lens structure, the first light output portion is convex-arc-shaped.