Patent ID: 8993871
Filing Date: 2015-03-31
Classification: F24S,G02B,H01L,H02S,Y02E

Abstract:
1. A concentrating lens array which includes a plurality of unit structures that are arranged either in line or a two-dimensional array on a configuration plane, wherein each said unit structure comprises: a first surface through which light enters inside of the unit structure; a second surface which reflects, back to the inside, the light that has entered the structure through the first surface and that has been transmitted through the inside; a third surface which reflects, back to the inside, the light that has been reflected from the second surface; and a fourth surface which lets the light that has been reflected from the third surface go out of the structure, in each said unit structure, the second and third surfaces are located between an incident plane including the first surface and an emitting plane including the fourth surface, at least one of the second and third surfaces reflects the light after having converged the incoming light, when viewed perpendicularly to, and from over, the incident plane, the second surface of each said unit structure is laid upon the third surface of an adjacent unit structure, and is located closer to the incident plane than the third surface of the adjacent unit structure is, and each said unit structure concentrates the light within two planes which intersect with the configuration plane at right angles and which are not parallel to each other by using the second surface and/or the third surface.