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Coronagraph contrast demonstrations with the high-contrast imaging testbed
SPIE Proceedings, 2004Predictions of contrast performance for the Eclipse coronagraphic telescope are based on computational models that are tested and validated with laboratory experience. We review recent laboratory work in the key technology areas for an actively-corrected space telescope designed for extremely high contrast imaging of nearby planetary systems.
John T. Trauger +8 more
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The high contrast imaging modes of MICADO
SPIE Proceedings, 2014We present in this paper an overview of the high contrast imaging modes of the wide-field imager MICADO. MICADO is a near-IR camera for the European Extremely Large Telescope (E-ELT), featuring a wide field (75”), spectroscopic and coronagraphic capabilities. It has been chosen by ESO as one of the two first-light instruments.
Baudoz, Pierre +10 more
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High-contrast imaging of moving targets
2011 Functional Optical Imaging, 2011The imaging of cells flowing through blood vessels can be a useful diagnostic tool'. However, live samples are usually transparent and contrast is poor with bright-field microscopy. A variety of methods are available to improve contrast including; phase contrast, differential interference contrast, fluorescent labelling and surface plasmon resonance ...
Bo Fu, Noah A. Russell
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High contrast imaging in the presence of turbulence
SPIE Proceedings, 2012High contrast imaging, also known as extreme adaptive optics, has been a topic of research in the astronomic community as an approach to image dim objects near bright objects, such as extra-solar planets. There are a variety of techniques ranging from coronagraphs, shaped pupils, pupil apodization, and the use of multiple deformable mirrors that ...
Brett A. Sickmiller +3 more
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Adaptive Optics for High-Contrast Imaging
EAS Publications Series, 2006This paper deals with adaptive optics in the framework of very high-contrast astronomical imaging. Starting from a brief global overview of classical adaptive optics (AO) systems, the specificities and main characteristics of extreme AO (XAO) systems are exposed.
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Introduction to High Contrast Imaging in Astronomy
EAS Publications Series, 2004High contrast imaging opportunties abound in astronomy, and some carry such intrinsic interest that they justify considerable effort to master the technical challenges. The field has a rich history dating back to the beginnings of electromagnetic theory, and ten years ago one might have been forgiven for thinking that the topic was passe.
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High Contrast Imaging and Extrasolar Planets
EAS Publications Series, 2003The physical bases of the detection and characterisation of extrasolar are reviewed and the first findings are presented. A special attention is paid to the imaging method in the reflected light and thermal emission regimes. They both have their advantages and disadvantages, including artefacts, in the determination of planet physical parameters (mass,
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NASA High Contrast Imaging for Exoplanets
Frontiers in Optics 2008/Laser Science XXIV/Plasmonics and Metamaterials/Optical Fabrication and Testing, 2008Described is NASA's ongoing program for detection and characterization of exo-solar planets via high-contrast imaging. Some of the more promising proposed techniques under assessment may enable detection of life outside our solar system.
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Contrast in High Resolution Images of Crystals
Proceedings, annual meeting, Electron Microscopy Society of America, 1972An attempt is made to understand experimentally observed high resolution electron microscope images. Iijima has obtained images that are good representations of the crystal potentials for a resolution of about 3Å using a defocus corresponding to the “optimum defocus condition”. This is to be expected for a thin phase object.
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