Stray Light Analysis Overview

The Stray Light corresponds to the contribution of the photons that you can visualize according to the sensor defined.

Description

The Stray Light Analysis allows you to visualize the contribution of the photons, separating them by sequence in the simulation results.

A sequence is the path taken by the rays, calculated either according to the faces (F) or the geometries (G) the rays hit.

During the Stray Light Analysis, a ray tracing is performed across the entire optical system, generating a simulation result that shows the contributions of all interactions until rays reach the sensor. The goal of the analysis is to identify stray light, such as bright spots, that affects and degrades the overall image quality.

Example of Sequences

Understanding the example:

Defining the sequence 1 per faces: the rays hit the face F1, then the face F2, the face F3 and the face F4. (F1 F2 F3 F4)
Defining the sequence 1 per geometries: the rays hit twice the geometry G1, then twice the geometry G2. (G1 G1 G2 G2)
Defining the sequence 2 per faces: the rays hit the face F1, then the face F2, then hit the faces F1 and F2 again, and finally the faces F3 and F4. (F1 F2 F1 F2 F3 F4)
Defining the sequence 2 per geometries: the rays hit the geometry G1 four times, then the geometry 2 twice. (G1 G1 G1 G1 G2 G2)

Note: Defining the sequences per faces is useful when you have only one geometry. Defining the sequences per geometries is useful when you have more than one geometry.

Note: In case of an optical system with one or more lenses, we recommend you to define the sequences per geometries.

The Stray Light Analysis is compatible with the Light Expert to visualize the interactive ray tracing of each sequence.