Galicher, Raphaël (University Paris Diderot)
The future Extremely Large Telescopes will provide a high angular resolution enabling the study of small circumstellar disk structures, Jupiter-like planets, and maybe super-Earths. The foreseen instrumentation will be composed of classical adaptive optics followed by a coronagraph and, an active and passive speckle minimization. The active minimization requires a focal plane wavefront sensor that measures the electric field from the coronagraphic science image to cancel the non-common path errors. Our team uses the self-coherent camera (SCC). After demonstrating high performance in laboratory (1e-8 raw contrast between 4 and 13 lambda/D), we implemented the SCC at the Palomar telescope on the stellar double corongraph (SDC). We present below the first results obtained at the telescope.
10.26698/AO4ELT5.0065- Proceeding PDF