Comparing geometrical and wave optical algorithms of a novel propagation code applied to the VLTI

Time-dependent modeling of controlled opto-mechanical systems (e.g. astronomical telescopes) is part of the VLTI system engineering work at ESO. For creation of optical models to be integrated within a dynamic Matlab/ Simulink ® simulation, a novel optical modeling tool has been developed. It offers a versatile set of geometrical and wave optical propagation algorithms each with its specific strengths. The article describes the algorithms —both from a theoretical and practical point of view. The VLTI as a “real world” application example is presented.