BACKGROUND

The code designation of the concentrator is 3RT:C (R--refracting section of a component lens, T--transmitting section of a component lens, and C--concentrating stage lens).

Prior art is limited to conical lenses which receive and emit beams which are parallel to the vertical optic axis.

DRAWINGS

FIG. 1 is an elevation of the conical beam concentrator with the lenses shown in section.

FIG. 2 is an elevation of the concentrator with a ray diagram.

DESCRIPTION

FIG. 1 shows the conical beam concentrator 3RT:C with upper component lens RT 1, middle component lens RT 2 and lower component lens RT 3 mounted in casing 4.

FIG. 2 shows the concentrator with a ray diagram. Convergent conical incipient beam 5 of diffused sunlight is received and transmitted by convex conical section 6, refracted by concave conical section 7, forming annular beam 9, and refracted by planar section 8, forming convergent conical beam 10.

Planar section 11 and convex conical section 12 transmit beams 9 and 10. Concave conical section 13 and convex conical section 14 refract beams 9 and 10, forming convergent conical beam 15.

Beam 15 is transmitted by convex conical section 16 and refracted by concave conical section 17, forming concentrated whole beam 18 which is emitted parallel to the vertical optic axis of the concentrator.

The intensity of concentrated whole beam 18 is as follows;

Area of incipient beam/area of concentrated beam=intensity.

30,130 mm.sup.2 /0.062 mm.sup.2 =485,967