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Using the emitters feature

Any surface can be given an emission property, making the surface an emitter.

A given surface can only represent a single emitter. To construct a system with multiple emitters in a common plane, you create multiple surfaces of zero thickness and give each surface an emission property.

The aperture property of the surface determines the shape of the emission region.

The aperture on a surface with emission is transparent and is used only for generation of emission rays.

To set up an emitter:

  1. Select a surface on the surface data editor
  2. Change its emission property from "None" to "Lambertian emission"
  3. Choose wavelength and cutoff N.A. parameters
  4. Choose an aperture to specify the shape of the emission

Emission
The emission property of a surface can be "None" or "Lambertian emission"
wavelength
Wavelength of the emitted rays in nm.
cutoff N.A.
The sine of the maximum half-angle of the emitted rays.

See also