| 摘要 |
The invention relates to sun protection installations comprising reflective sun protection lamellae consisting of portions having a toothed upper side disposed at least towards sun radiation influx wherein the individual teeth are formed of at least two tooth sides, and at least one first tooth side is, at lea st partly, exposed to sun light irradiation. Sun light irradiation, at least within the first lamella portions, can be retro-reflected by one single reflection into the outer space by the first tooth side having an angle of impact .alpha.1. The toot h angle of impact a1 of the tooth sides exposed to the sun light are so selected within the first lamella portions facing the irradiation area that in case of pa rallel sun light larger angles of impact .beta. of the sun radiation are obtained so th at inciding sun light may be reflected back, by one single reflection, to the outer space. Second or further lamella portions are so arranged at an angle .alpha.1 t hat small angles of impact .beta. on the tooth sides facing the sun will result but the sun light can be reflected into the interior space. In any case, tooth angles of impact .alpha.1 within the lamellae differ from each other.
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