Digital Simulation of Image-Forming Systems

In this communication we discussed briefly the difference between spatial and dynamic systems. Because the impulse response of a dynamic block and the impulse response (spread function) of a spatial block differ in a fundamental way, spatial systems cannot be simulated by applying the techniques developed for dynamic systems simulation. Therefore, there is a need for spatial systems simulation programs. We then described the Image Forming Systems Simulator IMSIM/1, a computer program developed for the simulation of incoherent photo-optical systems. Such a program provides a convenient tool for the photo-optical design engineer to study the performance of photo-optical systems before they actually are built.