Solar Control Tunable Lippmann Holowindows

Joanna Jannson; Tomasz Jannson; Kevin H. Yu

doi:10.1117/12.966291

2 December 1985 Solar Control Tunable Lippmann Holowindows

Joanna Jannson, Tomasz Jannson, Kevin H. Yu

Proceedings Volume 0562, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IV; (1985) https://doi.org/10.1117/12.966291
Event: 29th Annual Technical Symposium, 1985, San Diego, United States

Abstract

Tunable Lippmann Holowindows have been developed by NTS as a particular application for Broad-Band Lippmann Holograms investigated within Super High Efficiency (SHE) Holographic Technology. Those holograms can be tuned to be highly reflective (above 99%) in any part of the near UV, Visible and near IR. In particular, they can reflect all direct solar heat radiation and additionally, the near UV part of the solar spectrum that cannot be blocked by glass or acrylic. Additionally, they can be combined with conductive adhesives to create ideal cooling mirrors, with parameters much better than those of existing products. Therefore, they can create a new generation of high efficiency solar heat control windows whose rejection of adjusted parts of the solar spectrum still preserve high visible transmission (up to 87% for single glazing), and the near perfect (close to 100%) reflection of IR direct solar component. In the case of Tunable Lippmann Holowindows, it is possible to adjust independently the U-value, emittance and shading coefficient by the number of glazings, conductive adhesive thickness and hologram reflection, respectively. In other words, SHE Holographic Technology introduces to heat mirror engineering a new degree of freedom - separate near IR reflection coefficient.

Citation Download Citation

Joanna Jannson, Tomasz Jannson, and Kevin H. Yu "Solar Control Tunable Lippmann Holowindows", Proc. SPIE 0562, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IV, (2 December 1985); https://doi.org/10.1117/12.966291

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