Phase-diffractive coating for daylight control on smart window

Frederic Perennes; Patrice J.H. Twardowski; D. Gesbert; Patrick Meyrueis

doi:10.1117/12.130523

25 November 1992 Phase-diffractive coating for daylight control on smart window

Frederic Perennes, Patrice J.H. Twardowski, D. Gesbert, Patrick Meyrueis

Proceedings Volume 1727, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Selective Materials, Concentrators and Reflectors, Transparent Insulation and Superwindows; (1992) https://doi.org/10.1117/12.130523
Event: Optical Materials Technology for Energy Efficiency and Solar Energy, 1992, Toulouse-Labege, France

Abstract

Daylight can be processed by a smart window in a transmission, reflective, refractive, and diffractive mode. In the future an optimization will be realized by a mixing of these approaches depending on the applied cases. Non-imaging diffractive optics has its roots in the work done in holographic diffractive coating for head up displays (HUD) and helmet mounted displays. For having globally good results on smart window with diffractive coating, a very high diffraction efficiency must be reached close to 100% without having a too important lowering of the control of other parameters of the light processed by a smart window (direction and frequency control essentially). We propose a method for designing, realizing, and using diffractive coating for a smart window that is based on a new organic material and diffractive model that were already validated in HUD. Potential low cost is possible for mass production on a large surface with an adapted investment. We describe the present technology and its limits and the ones that can be reached in the future. In this work, we present a holographic way to modify the slant of sun rays through a window, and to filter infrared radiations by using dichromated gelatin material. In this way it would be able to ensure a more uniform lighting and a more pleasant temperature inside buildings or vehicles, without using dye or photochromics glasses.

Citation Download Citation

Frederic Perennes, Patrice J.H. Twardowski, D. Gesbert, and Patrick Meyrueis "Phase-diffractive coating for daylight control on smart window", Proc. SPIE 1727, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Selective Materials, Concentrators and Reflectors, Transparent Insulation and Superwindows, (25 November 1992); https://doi.org/10.1117/12.130523

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KEYWORDS

Holograms

Holography

Coating

Diffraction

Mirrors

Visible radiation

Holographic optical elements

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