Modeling a slicer mirror using Zemax user-defined surface

A slicer mirror is a complex surface composed by many tilted and decentered mirror sub-surfaces. The major difficulty to model such a complex surface is the large number of parameters used to define it. The Zemax’s multi-configuration mode is usually used to specify each parameter (tilts, curvatures, decenters) for each mirror sub-surface which is then considered independently. Otherwise making use of the user-defined surface (UDS-DLL) Zemax capability, we are able to consider the set of sub-surfaces as a whole surface. In this paper, we present such a UDS-DLL tool comparing its performance with those of the classical multi-configuration mode. In particular, we explore the use of UDS-DLL to investigate the cross-talk due to the diffraction on the slicer array mirrors which has been a burden task when using multi-configuration mode.