| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light condensing-type photovoltaic power generation apparatus having high light-condensing efficiency and provide with a collective lens in consideration of a width of each prism part, and an influence of chromatic aberration. <P>SOLUTION: In an light condensing-type photovoltaic power generation apparatus including a Fresnel lens and a light sensing portion, an incident surface of each prism part of a Fresnel lens cross section has an incident surface angle-of-inclination β to a direction perpendicular to an optical axis, and an exiting surface has an exiting surface angle-of-inclination α to a direction perpendicular to an optical axis. On an incident surface of each prism part, a first incident point located at the vicinity of the endpoint of a far side from the optical axis, and a second incident point located at the vicinity of the endpoint of a near side from the optical axis are assumed, and the exiting surface angle-of-inclination α and the incident surface angle-of-inclination β of each prism part are set up so that first light which is incident from the first incident point, is refracted in the exiting surface, and exits from the exiting surface, and second light which is incident from the second incident point, is refracted in the exiting surface, and exits from the exiting surface may both reach the light sensing portion. <P>COPYRIGHT: (C)2012,JPO&INPIT |
