Solar energy is a sustainable energy that is gradually becoming one of the main energies of the future. Today, 2 major solar power generation technologies exist: photovoltaics (PV) and concentrated solar thermal (or thermodynamic) (CSP: Concentration Solar Power). Thanks to its ability to store solar energy in the form of heat in large quantities and at a lower cost, concentrated solar represents a credible alternative to photovoltaics in regions with high direct sunlight. One of the preferred ways to reduce the cost of CSP plants is to increase their conversion efficiency, in particular by increasing the operating temperature of the solar receiver and improving the uniformity of the distribution of this temperature. The CLE-DE-SOL project aims to acquire a better control of the concentrated flow received by a receiver placed at the heart of a power plant or a solar furnace implementing a helioostate field. Mechanically precise heliostats must be used to optimise the distribution of concentrated solar flux. The project will be carried out by the PROMES laboratory teams. The solutions developed will be realised on the solar installations of: . Themis (former thermodynamic solar power plant, today a regional experimental platform). and the Grand Four d’Odeillo.