DICOS is a technological demonstrator under a stratospheric balloon for advanced pointing and wavefront stability technologies. The aim is to reach 10 mas fine pointing and 20 nm rms wavefront error (WFE), with 1 nm rms stability. The sizing case comes from the coronography technique for exoplanets direct detection. The instrument is based on a 40 cm telescope made in aluminum and mounted in a CARMEN gondola. The deformations and pointing errors are compensated by active loops driving a deformable mirror (DM) with 97 actuators. The current funded phase of the project will end in 2024 by a full-scale ground demonstration.
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