Rob Gontrum

High-contrast imager for complex aperture telescopes (HiCAT): 10. Broadband Zernike wavefront sensor under natural and artificial drifts

Raphaël Pourcelot, Emiel H. Por, Mamadou N’Diaye, Benjamin Buralli et autres

We report on experimental stabilization of low-order aberrations on a high-contrast testbed for exoplanet imaging, in up to 10% broadband light under natural and artificial drifts. The measurements are performed with a Zernike wavefront sensor using the light rejected by the focal …

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High-contrast imager for complex aperture telescopes (HiCAT): 8. Dark zone demonstration with simultaneous closed loop low-order wavefront sensing and control

Rémi Soummer, Emiel H. Por, Raphaël Pourcelot, Susan F. Redmond et autres

We present recent laboratory results demonstrating high-contrast coronagraphy for the future space-based large IR/Optical/Ultraviolet telescope recommended by the Decadal Survey. The High-contrast Imager for Complex Aperture Telescopes (HiCAT) testbed aims to implement a system-level hardware demonstration for segmented aperture coronagraphs with wavefront …

us, fr (code pays fourni par la source)

High-contrast imager for complex aperture telescopes (HiCAT): 7. Dark zone demonstration with fully segmented aperture coronagraph

Rémi Soummer, Iva Laginja, Scott D. Will, Marshall D. Perrin et autres

We present recent laboratory results demonstrating high-contrast coronagraphy for future space-based large segmented telescopes such as the Large UV, Optical, IR telescope (LUVOIR) mission concept studied by NASA. The High-contrast Imager for Complex Aperture Telescopes (HiCAT) testbed aims to implement a system-level …

us, fr (code pays fourni par la source)

Coronagraphy for segmented apertures: Results from demonstrations on the HICAT testbed

Marshall D. Perrin, Gregory R. Brady, Thomas Comeau, J. Fowler et autres

High-contrast imager for complex aperture telescopes (HiCAT): 6. Two deformable mirror wavefront control (Conference Presentation)

Rémi Soummer, Iva Laginja, Scott D. Will, Roser Juanola-Parramon et autres

The goal of the High-contrast imager for Complex Aperture Telescopes (HiCAT) testbed is to demonstrate coronagraphic starlight suppression solutions for future segmented aperture space telescopes such as the Large UV, Optical, IR telescope (LUVOIR) mission concept being studied by NASA. The testbed …

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Coronagraphy for segmented aperture space telescopes: results on the HiCAT testbed

Rémi Soummer, Gregory R. Brady, Keira J. Brooks, Tom Comeau et autres

High-contrast imager for complex aperture telescopes (HiCAT): 5. first results with segmented-aperture coronagraph and wavefront control

Élodie Choquet, A. J. Eldorado Riggs, Rémi Soummer, Gregory R. Brady et autres

Segmented telescopes are a possible approach to enable large-aperture space telescopes for the direct imaging and spectroscopy of habitable worlds. However, the increased complexity of their aperture geometry, due to the central obstruction, support structures and segment gaps, makes high-contrast imaging very …

us, fr (code pays fourni par la source)

Current Status of the High Contrast Imager for Complex Aperture Telescopes (HiCAT) Testbed

Keira J. Brooks, Gregory R. Brady, A. González Brito, Tom Comeau et autres