Procedure for simulating divergent-light halos

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    Divergent-light halos are halos produced by light from nearby light sources, like street lamps being scattered by small crystals of ice floating in the air. The use of "brute-force" Monte Carlo methods to simulate such halos is extremely inefficient, as most scattered rays will not hit the eye of the observer. I present a new procedure for Monte Carlo simulations of divergent-light halos. This procedure uses rotational symmetries to make a selected sampling of events that greatly improves the computational efficiency of the algorithm. We can typically generate a simulated halo display in minutes using a personal computer, several orders of magnitude more rapid than a simple brute-force method. The algorithm can also optionally generate three-dimensional pictures of divergent-light halo displays. (C) 2003 Optical Society of America
    Original languageEnglish
    Pages (from-to)6559-6563
    JournalApplied Optics
    Issue number33
    Publication statusPublished - 2003

    Subject classification (UKÄ)

    • Biophysics


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