Creating Flickering Surface Source

The following procedure helps you create a dynamic Inverse simulation of a Surface source in order to show the light flickering.

In this procedure, the Surface source will flicker. Anything you add in the simulation (geometries, sources, sensor) will be static.
Note: The procedure highlights the main steps with a focus on the dynamic parameters. If you need more precision on the different features click the related feature links.

To create a flickering Surface source:

  1. From the Light Simulation tab, click System > Camera .
  2. From the Mode drop-down list, select Photometric/Colorimetric to enable the advanced definition.
  3. Define the Camera sensor parameters, and more specifically:
    • the Integration: corresponds to the time needed to get the data acquired by one row of pixels.
    • the Lag time: corresponds to the time difference between two rows of pixels to start the integration.

    Note: In this procedure example, the Camera sensor is static. You do not have to input a Trajectory file.
  4. From the Light Simulation tab, click Surface .
  5. Define the Surface source parameters, and more specifically:
    • the Flux variation file: *.json file that defines the samples for one period representing the variation of the relative flux of the source with time.
    • the Relative lag: represents the relative time along the period when the source starts to emit light. That means the relative lag includes a temporal shift of the time period.

  6. From the Light Simulation tab, click Inverse .
  7. Define the Inverse simulation parameters, and more specifically:
    • Set Timeline to True
    • Set Start time of the Timeline
    • Add the Camera sensor to the simulation
    • Add the Surface source to the simulation
  8. Click Compute to launch the simulation.
The Inverse simulation generates a spectral exposure map (*.xmp) for the Camera sensor. This map corresponds to the acquisition of the Camera sensor and expresses the data for each pixel in Joules/m²/nm.