|The MiePlot program has been designed with an "intuitive"
- which should be simple to use. Feedback from actual users will
reveal how much "intuition" is needed in practice! Your comments
(critical or otherwise) will be used to improve the program.
As it may not be immediately obvious how to use some features, here are a few hints and tips.
Replot: The Replot button is very important: it allows
change the vertical scale from "logarithmic" to "linear" or vice versa
- as well as modifying the ranges covered by the vertical or horizontal
scales. If you use the "Automatic" option for the maximum and
values of the vertical scale, Replot adjusts the vertical scale
Furthermore, when used with multiple wavelengths, the coloured bar
are also automatically adjusted so that the brightest part is just
As an example, Fig. 1 shows the primary and secondary rainbows, but the
coloured bar barely shows the secondary rainbow because it is much
than the primary rainbow. Fig. 2 was created by using the Replot
facility to restrict the scattering angles to the range 120°
so that the coloured bar reveals the colours of the secondary rainbow.
Fig. 1 Primary and secondary rainbow (r =100 µm)
Disperse drops: For graphs of Intensity versus scattering angle, simulation of optical phenomena caused by water drops of disperse size requires separate calculations for each drop size represented by the Normal or Log-Normal distributions. Hence, the calculations can be very long: if you select N = 20, the calculation will take 20 times as long as the calculation for the monodisperse condition.
As Lee diagrams require huge amounts of computation, a different approach is necessary to simulate the effects of disperse drops. Instead of repeating the calculations, Lee diagrams are initially calculated for monodisperse drops. Users may then select the disperse option and the diagrams are replotted using the previously computed data for "adjacent" drop sizes. There are some limitations on the maximum and minimum values for standard deviation - but try it out!
Fig. 2 Secondary rainbow (r =100 µm)
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