FRED is an optical engineering software that uses ray tracing to simulate the path that light takes through optical systems. FRED has been used for more than 20 years by leading science, research and engineering companies to solve their toughest optical simulation problems.

FRED was designed from the ground up to be a general purpose ray tracer, with a simple CAD-like user interface to make it easy to work with optomechanical models of any level of complexity, and includes the ability to propagate both coherent and incoherent light and assign realistic surface properties to every component of a system.