CPC F21S 11/007 (2013.01) [E04F 10/08 (2013.01); E04F 10/10 (2013.01); E06B 1/00 (2013.01); G02B 5/04 (2013.01); G02B 5/045 (2013.01); G02B 17/00 (2013.01); G02B 17/006 (2013.01); G02B 19/0042 (2013.01); E06B 2009/2417 (2013.01)] | 20 Claims |
1. An optical panel that comprises a plurality spaced apart elongated reflective elements arranged in a stack that spans a height of the optical panel and each elongated reflective element in said plurality has a reflective first surface and an opposing second surface, in which the second surface has a series of pairs of facets, each pair of most adjacent facets alternating between one of an obtuse and acute angle with respect to the reflective first surface in which the reflective first surface is operative to reflect visible light arriving in a first direction to a second direction that is opposite the first direction and is also operative to transmit infrared light through the elongated reflective element such that it is then reflected by the series of pairs of facets in the first direction.
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