CONCENTRATING PHOTOVOLTAIC SKYLIGHT BASED ON HOLOGRAMS AND/OR METHODS OF MAKING THE SAME
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United States of America Patent
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Issued Date -
Jan 28, 2016
app pub date -
Jul 25, 2014
filing date -
Jul 25, 2014
priority date (Note) -
Abandoned
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Abstract
Improved building-integrated photovoltaic (BIPV) systems according to certain example embodiments may include concentrated photovoltaic skylights or other windows in which holographic optical elements (HOEs) are provided. The HOEs are formed on or in a substantially planar glass substrate, e.g., at light coupling locations, and they help form a holographic projection of light in a desired wavelength range on a photovoltaic module. The photovoltaic module may, for example, be connected to an outer edge of the substrate in certain example embodiments. Holographically projected light may propagate through the substrate in accordance with the principles of total internal reflection (TIR), which may be somewhat lossy in some cases. A lens provided between the light source (e.g., the sun) may help re-orient the light in a desired direction so as to improve the efficiency of the HOEs.
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