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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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Passive optical element with selective angular reflection.

C Tremblay, F Rheault, R Boulay

    Applied Optics
    |May 11, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a passive optical element for selective solar gain control in buildings. It utilizes total internal reflection (TIR) to block summer sun while allowing winter light, optimizing building energy efficiency.

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    Area of Science:

    • Materials Science
    • Optics
    • Building Physics

    Background:

    • Buildings experience significant solar thermal gain, impacting energy consumption.
    • Seasonal control of solar energy input is crucial for energy efficiency.
    • Existing solutions for solar gain control often lack passive or selective capabilities.

    Purpose of the Study:

    • To develop a passive optical element for selective solar thermal gain control.
    • To enable sunlight entry during fall/winter and block it during spring/summer.
    • To describe the optical element, derive design equations, and optimize parameters.

    Main Methods:

    • Design and development of a passive optical element with selective angular reflection.
    • Utilizing the principle of total internal reflection (TIR).
    • Optical and geometrical parameter optimization.

    Main Results:

    • The proposed optical element selectively allows solar transmission based on the sun's astronomical path.
    • Total internal reflection (TIR) effectively rejects direct sunlight during spring/summer.
    • Optimization of optical and geometrical parameters enhances performance.

    Conclusions:

    • The passive optical element offers a novel solution for seasonal solar gain management in buildings.
    • This technology can significantly contribute to regularizing solar thermal gain and improving building energy efficiency.
    • Further optimization of optical and geometrical parameters is key for practical application.