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Retroreflective photometry for screen efficiency evaluation.

G F Marshall, M H Williams

    Applied Optics
    |January 23, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Screen gain and lobe width determine projection screen efficiency. A novel photometer measures luminance and evaluates screen performance rapidly using visual, photoelectric, and photographic methods.

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    Area of Science:

    • Optics
    • Materials Science

    Background:

    • Projection screen performance is critical for display technologies.
    • Quantifying screen efficiency involves understanding luminance gain and angular distribution.

    Purpose of the Study:

    • To develop an analytical method for determining screen transmission/reflection efficiency.
    • To introduce a versatile screen photometer for precise luminance measurements.

    Main Methods:

    • Analytical modeling of angular luminance gain using a cosine power function.
    • Adaptation of a spectrometer into a screen photometer for retroreflective measurements.
    • Utilizing visual, photoelectric, and photographic modes for luminance assessment.

    Main Results:

    • Peak luminance gain and lobe width serve as effective coordinates for efficiency graphing.
    • The developed photometer accurately measures luminance across a wide range and angles.
    • A graphical method allows for rapid performance evaluation and comparison of screen efficiencies.

    Conclusions:

    • The analytical approach provides a simplified method for screen efficiency determination.
    • The screen photometer offers a comprehensive tool for characterizing projection materials.
    • This work facilitates efficient performance assessment and selection of projection screen technologies.