Physical Camera Sensor - Specific Cases

The following page provides you with specific cases to take into account when designing a system with a Physical Camera included.

Light propagation in direct simulation

All geometries included in the Speos Light Box of a Physical Camera are considered as part of the sensor. That means, like every sensor, the Physical Camera has no impact on the light propagation.

Let's take two examples with geometries with an absorbing envelop:

Example 1

In the image 1, the simulation is composed of:
  • a Physical Camera, which contains the geometry with the absorbing envelop
  • a source
  • an Irradiance sensor (to highlight the case)

The Physical Camera does not generate shadow on the irradiance plane on the ground, because the absorbing geometry is included in the Physical Camera.
In the image 2, the simulation is composed of:
  • a Physical Camera, which contains the geometry with the absorbing envelop
  • a source
  • an Irradiance sensor (to highlight the case)
  • the geometry with the absorbing envelop

The absorbing geometry is added in the simulation besides the Physical Camera. The absorbing geometry generates shadows.

However, we recommend avoiding such practices, as you may face with tangency issue because the geometry is included twice (once in the Physical Camera and once in the geometries list of the simulation).

Example 2

In this second example, the Light Box included in the Physical Camera includes an absorbing face located after the Irradiance sensor. The light rays are not absorbed by this face.