Light concentrating method, light concentrating device using same, and solar power generator

A light concentrating device arranged in a space defined by a first axis (X) and a second axis (Y) orthogonal to each other, and a third axis (Z) perpendicular to the first axis (X) and the second axis (Y), comprising:

• a first specular surface having a first profile of a concave curve, which is a cross section taken by a plane parallel to the second axis (Y) and the third axis (Z), wherein the first profile extends in parallel to the first axis (X);
• and
• a second specular surface having a second profile of a concave curve, which is a cross section taken by a plane parallel to the first axis (X) and the second axis (Y), wherein the second profile extends in parallel to the third axis (Z),
• wherein the first specular surface has a predetermined length parallel to the second axis (Y) and a predetermined width parallel to the first axis (X) when viewed in parallel to the third axis (Z), and the first specular surface is configured to receive incident lights entering in a first direction (+Z direction) and to reflect the incident lights along a diagonal direction defined by a second direction (−Z direction) opposite to the first direction (+Z direction) and a third direction (+Y direction) parallel to the second axis (Y) so as to generate first reflected lights,
• wherein the second specular surface is configured to reflect the first reflected lights in a diagonal direction defined by a fourth direction (−Y direction) opposite to the third direction (+Y direction) and the second direction (−Z direction) so as to generate second reflected lights,
• wherein the second reflected lights are concentrated into a target area of which a width and a length are respectively less than the predetermined width and the predetermined length,
• wherein a solar panel is arranged in the target area, extends in parallel to the third axis (Z), and is disposed above the first specular surface member in the second direction (−Z direction),
• wherein an upper end of the solar panel is disposed above the second specular surface member in the second direction (−Z direction),
• wherein the solar panel generates solar power performing light concentration of (A*B)/(C*D) times, and
• wherein A denotes the predetermined length of the first specular surface parallel to the second direction (Y), B denotes the predetermined width of the first specular surface parallel to the first axis (X), C denotes a length of the solar panel, and D denotes a width of the solar panel.