Speaker
Description
We present the Phase B planning of the Transient High-Energy Sky and Early Universe Surveyor (THESEUS) Infrared Telescope’s Calibration Unit, carried out during Phase A, with emphasis on LED-based calibration concepts and optical design considerations. The work outlines a structured testing strategy that combines individual device characterization with batch-level validation to ensure consistent and reliable performance. In parallel, we investigate how different LED configurations and mounting approaches influence the optical behavior of the system. Ray-tracing simulations are used to explore light propagation and assess potential systematic effects impacting calibration accuracy. By integrating planned experimental activities with simulation-driven studies, this work establishes a solid foundation for the development of a robust and well-characterized calibration unit in Phase B.