| 摘要 |
PROBLEM TO BE SOLVED: To condense many sun beams and to transmit them to a specified place through a light duct having small cross-sectional area by specifying the combination of a spherical mirror, a hyperboloidal mirror and a plane mirror. SOLUTION: This device is constituted of the spherical mirror 1a having an aperture part 4a in its center part and rotating centering a horizontal rotary shaft Ah and a vertical rotary shaft Av, the hyperboloidal mirror 2a arranged in the vicinity of the same point as the focal point F1a of the mirror 1a, and the plane mirror 3a arranged so that it may be rotated at the same angle as the mirror 1a in a horizontal direction and rotated at the angleΘy-90 deg.+Θx/2+Θx/2+Θk/2 in a vertical direction. When an optical axis A1 turns toward the sun, the mirror 1a receives the directly transmitted light beam from the sun and reflects it toward the focal point F1a of the mirror 1a. The mirror 2a whose focal point is put at the same point as the mirror 1a recevies the reflected light beam from the mirror 1a and reflects it as parallel beams toward the mirror 3a. The mirror 3a reflects it in the direction of a previously set angleΘk.Θx is a crossing angle formed by an optical axis A1 with a horizontal surface. |
