2017
DOI: 10.3847/1538-3881/aa91d7
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Active Correction of Aperture Discontinuities-Optimized Stroke Minimization. II. Optimization for Future Missions

Abstract: High-contrast imaging and spectroscopy provide unique constraints for exoplanet formation models as well as for planetary atmosphere models. Instrumentation techniques in this field have greatly improved over the last two decades, with the development of stellar coronagraphy, in parallel with specific methods of wavefront sensing and control. Next generation space-and ground-based telescopes will allow the characterization cold solar-system like planets for the first time and maybe even in situ detection of bi… Show more

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Cited by 35 publications
(40 citation statements)
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“…We fit a line to the increasing slope of this curve and found contrast degrades as F 2 as expected from the C DH,2 contrast residual. We do not explain the limitation at small Fresnel number in this proceedings but in an upcoming article 19 For throughput, we see that the throughput performance is almost flat until F ∼ 10 3 but then decreases quickly at higher Fresnel numbers. However, one has to remember that we assumed that the surface outside of the second DM is reflective, although not actuated.…”
Section: End-to-end Simulation With the Acad-osm Methods And The Wfirsmentioning
confidence: 89%
See 1 more Smart Citation
“…We fit a line to the increasing slope of this curve and found contrast degrades as F 2 as expected from the C DH,2 contrast residual. We do not explain the limitation at small Fresnel number in this proceedings but in an upcoming article 19 For throughput, we see that the throughput performance is almost flat until F ∼ 10 3 but then decreases quickly at higher Fresnel numbers. However, one has to remember that we assumed that the surface outside of the second DM is reflective, although not actuated.…”
Section: End-to-end Simulation With the Acad-osm Methods And The Wfirsmentioning
confidence: 89%
“…The active correction for aperture discontinuities technique (ACAD) [14][15][16] was developed for this reason, and improved recently into the active correction for aperture discontinuities technique-opimized stroke minimization (ACAD-OSM, see paper #10400-16, Mazoyer et al, in these proceedings) technique. [17][18][19] However, the use of DMs for active correction comes with limitations that have to be understand to help the design of the instruments.…”
Section: Introductionmentioning
confidence: 99%
“…A first implementation of adaptive coronagraphy is through leveraging of the DM(s) to dig coronagraphic dark holes. 2 The most generic formulation for any telescope aperture is through the Active Correction of Aperture Discontinuities, 29 which uses the common two-DM architecture of space-based high-contrast systems to augment the coronagraphic performance. Novel optical elements that derive from the display/projector industry are currently being successfully tested for adaptive coronagraphy with a large number of degrees of freedom (i.e.…”
Section: Adaptive Coronagraphymentioning
confidence: 99%
“…The Electric Field Conjugation technique (EFC) derives a DM setting required to achieve a desired electric field in the focal plane ). The performance of these techniques can be improved using regularization terms to account for example for the obstructed apertures or the use of two DMs (Pueyo et al 2009;Mazoyer et al 2018) or in the case of large aberrations (Herscovici-Schiller et al 2018a). All these techniques (WFS and WFC) have been developed and tested independently in laboratories in different environmental conditions (Mazoyer et al 2019).…”
Section: Introductionmentioning
confidence: 99%