Point Source

Light Properties

In RAYX, every ray is described by four properties. The values are randomly generated within the given distribution to ensure minimal systematic errors during simulation.

Light properties:

• Origin
• Direction
• Photon Energy
• Polarization

Origin

The origin for each ray is described by its x, y, and z position.

Tracing Parameters

• sourceWidthDistribution
• sourceHeightDistribution
• horDivDistribution
• verDivDistribution
• Ver Div
• Hor Div
• Source Depth
• Source Height
• Source Width
• Linear Pol 0
• Linear Pol 45
• Circular Pol
• Energy
• Energy Spread
• Energy Spread Type
• Energy Distribution Type
• Energy Distribution File

RML Object

To trace a Point Source through an RML file, use an XML object to encapsulate all relevant information about the light source. Below is the default configuration for a point source from RAY-UI, which can be used as a template. It is recommended to include an Imageplane at the end for clearer simulation results.

<object name="Point Source" type="Point Source">
    <param id="numberRays" enabled="T">200</param>
    <param id="sourceWidthDistribution" comment="gaussian (sigma)" enabled="T">1</param>
    <param id="sourceWidth" enabled="T">0.065</param>
    <param id="sourceHeightDistribution" comment="gaussian (sigma)" enabled="T">1</param>
    <param id="sourceHeight" enabled="T">0.04</param>
    <param id="sourceDepth" enabled="T">1</param>
    <param id="horDivDistribution" comment="gaussian (sigma)" enabled="T">1</param>
    <param id="horDiv" enabled="T">1</param>
    <param id="verDivDistribution" comment="gaussian (sigma)" enabled="T">1</param>
    <param id="verDiv" enabled="T">1</param>
    <param id="alignmentError" comment="Yes" enabled="T">0</param>
    <param id="translationXerror" enabled="F">5</param>
    <param id="translationYerror" enabled="F">5</param>
    <param id="rotationXerror" enabled="F">0</param>
    <param id="rotationYerror" enabled="F">0</param>
    <param id="energyDistributionType" comment="Values" enabled="T">1</param>
    <param id="photonEnergyDistributionFile" absolute="" enabled="F"></param>
    <param id="photonEnergy" enabled="T">151</param>
    <param id="energySpreadType" comment="white band" enabled="T">0</param>
    <param id="energySpreadUnit" comment="eV" enabled="T">0</param>
    <param id="energySpread" enabled="T">6</param>
    <param id="linearPol_0" enabled="T">1</param>
    <param id="linearPol_45" enabled="T">0</param>
    <param id="circularPol" enabled="T">0</param>
    <param id="sourcePulseType" comment="all rays start simultaneously" enabled="T">0</param>
    <param id="sourcePulseLength" enabled="F">0</param>
    <param id="worldPosition" enabled="F">
      <x>0</x>
      <y>0</y>
      <z>0</z>
    </param>
    <param id="worldXdirection" enabled="F">
      <x>1</x>
      <y>0</y>
      <z>0</z>
    </param>
    <param id="worldYdirection" enabled="F">
      <x>0</x>
      <y>1</y>
      <z>0</z>
    </param>
    <param id="worldZdirection" enabled="F">
      <x>0</x>
      <y>0</y>
      <z>1</z>
    </param>
</object>