How to model a thick diffuser by using rand() function in a wavefront propagation system

I am trying to implement a "thick" diffuser on a test object in a simple SLM (spatial light modulator) simulation. Right now, I can a simply model a simple diffuse illumination by multiply a rand() distribution to the test object. I want to somehow model the diffuser as a plane with varied thickness.

Answer 1

[Dhruv]

To model a thick diffuser using the “rand” function in MATLAB and Simulink, you can follow these steps:

1. Define the parameters of the diffuser:

• Thickness: Specify the maximum thickness of the diffuser.

• Resolution: Determine the number of samples along the thickness direction.

2. Generate a random distribution representing the diffuser thickness:

• Create a matrix of size [resolution x resolution] filled with random numbers between 0 and 1 using the “rand” function.

• Scale the matrix by the maximum thickness to obtain the random diffuser thickness distribution.

3. Apply the diffuser effect to the test object:

• Create a grid of points corresponding to the test object surface.

• For each point, add the diffuser thickness value from the generated distribution to the z-coordinate of the point.

Remember to adjust the parameters according to your specific simulation setup and desired diffuser characteristics. Hopefully the above steps will help you get started.