<!--
This is a sample XML file which defines a point object for the MedCosm CGHMaker program on www.medcosm.com.  The resultant fringe pattern is a fresnel zone plate, or fresnel lens.  

The single point source is placed at:
x:  300 (pixels) * 423e-7 (pixels/meter) = 0.01269 (meters)
y:  300 (pixels) * 423e-7 (pixels/meter) = 0.01269 (meters)
z:  4 (meters)

with the following parameters:
wavelength:  630e-9 (meters)
phase:  irrelevant, since this is only the interference of a single point with a plane wave...  and you probably should have "randomize phase" set to "on" anyway!

So the fringes will be centered if you calculate a 600 x 600 pixel plate with a spacing of 423e-7 (dots/meter), using a red wavelength of 630e-9 (meters).

Feel free to edit virtually anything.  The worst that will happen is that you'll break something!
-->

<PointSourceArray>
  <PointSource x="0.01269" y="0.01269" z="4" amp="1" wavelength="670e-9" phase="-1.25"/>
</PointSourceArray>
