Author

J. K. Wallace

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Open access Aug 2026

On-sky demonstration of a vector Zernike wavefront sensor in a cascaded adaptive optics system

Future high-contrast instruments aim to directly image and characterise Earth-like exoplanets. Achieving the required contrast requires exquisite image quality, and in particular a high-performance correction of the optical aberrations. Hence, future instruments will use adaptive optics (AO) systems operating at increa...

M. Motte, V. Chambouleyron, R. Fétick et al. · Astronomy & Astrophysics · 0 citations

Aug 2026

Point spread function subtraction using telemetry data: one more step on the path to reaching the photon-noise limit in high-contrast imaging

Current HCI systems are limited by residual starlight, resulting from atmospheric turbulence unseen by the adaptive optics system or stemming from imperfections in the optical system itself. This leads to speckles in the PSF of the final images inhibiting our detection capabilities. Reaching the photon-noise limit in h...

S. Juillard, O. Guyon, Niyati Desai et al. · Astronomical Telescopes + In... · 0 citations