Light is almost the only information providing us news from the space. Astronomers imagine, design and built ever more powerful instruments to capture the tiny flux of photons coming from far regions of the cosmos. Micro-optics components provided by SILIOS allow for the qualification of AO systems, for the test of co-phasing methods or for the improvement of coronography instruments. SILIOS components participate to the instrument refinement for exo-planet finding or other current topics.