Methods are presented for the interpretation of the polarization aberration of optical systems.
The polarization properties of ray paths through optical systems are classified as …

We propose a solution to the problem of astrometric and photometric calibration of
coronagraphic images with a simple optical device that, in theory, is easy to use. Our design …

The Shaped Pupil Coronagraph (SPC) is a high-contrast imaging system pioneered at
Princeton for detection of extra-solar earthlike planets. It is designed to achieve 10-10 …

We present the first results from the polarimetry mode of the Gemini Planet Imager (GPI),
which uses a new integral field polarimetry architecture to provide high contrast linear …

Context. Direct imaging of exoplanets requires very high contrast levels, which are obtained
using coronagraphs. But residual quasi-static aberrations create speckles in the focal plane …

Context. The imaging sharpness of an X-ray telescope is chiefly determined by the optical
quality of its focusing optics, which in turn mostly depends on the shape accuracy and the …

High contrast imaging from space relies on coronagraphs to limit diffraction and a wavefront
control systems to compensate for imperfections in both the telescope optics and the …

A Monte Carlo simulation of X-ray and optical polarization by Thomson scattering in
ellipsoidal circumstellar envelopes surrounding X-ray sources and young stars is presented …

We calculate a theoretical model of the polarization properties of a Gregory-Coudé
telescope to predict the behaviour of the German Gregory-Coudé Telescope installed at the …

We investigate the pattern of residual speckles obtained with high‐contrast coronagraphs
and extreme adaptive optics systems. In particular, we provide evidence of symmetry …