FRED allows for simulation of physical optics phenomena such as diffraction and interference. With this capability, components such as Gaussian laser beams and interferometers can be accurately modeled and incorporated into optical systems.
The FRED Model
Newton’s Rings form when reflections from a planar surface interfere with reflections from a spherical surface in contact. The interference pattern is based on increasing optical path difference from the point of contact outward. The number of rings is dependent on the radius of curvature of the surface being tested. A FRED model of Newton’s Rings is shown below:
The associated FRED file can be downloaded from our Knowledge Base.