Optimum synthetic-aperture imaging of extended astronomical objects
In optical aperture-synthesis imaging of stellar objects, different beam combination strategies are used and proposed. Coaxial Michelson interferometers are very common and a homothetic multiaxial interferometer is recently realized in the Large Binocular Telescope. Laboratory experiments have demon...
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| Veröffentlicht in: | Journal of the Optical Society of America. A, Optics, image science, and vision Optics, image science, and vision, 2007-04, Vol.24 (4), p.1042-1052 |
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| container_title | Journal of the Optical Society of America. A, Optics, image science, and vision |
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| creator | VAN DER AVOORT, Casper PEREIRA, Silvania F BRAAT, Joseph J. M DEN HERDER, Jan-Willem |
| description | In optical aperture-synthesis imaging of stellar objects, different beam combination strategies are used and proposed. Coaxial Michelson interferometers are very common and a homothetic multiaxial interferometer is recently realized in the Large Binocular Telescope. Laboratory experiments have demonstrated the working principles of two new approaches: densified pupil imaging and wide field-of-view (FOV) coaxial imaging using a staircase-shaped mirror. We develop a common mathematical formulation for direct comparison of the resolution and noise sensitivity of these four telescope configurations for combining beams from multiple apertures for interferometric synthetic aperture, wide-FOV imaging. Singular value decomposition techniques are used to compare the techniques and observe their distinct signal-to-noise ratio behaviors. We conclude that for a certain chosen stellar object, clear differences in performance of the imagers are identifiable. |
| doi_str_mv | 10.1364/JOSAA.24.001042 |
| format | Article |
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We develop a common mathematical formulation for direct comparison of the resolution and noise sensitivity of these four telescope configurations for combining beams from multiple apertures for interferometric synthetic aperture, wide-FOV imaging. Singular value decomposition techniques are used to compare the techniques and observe their distinct signal-to-noise ratio behaviors. We conclude that for a certain chosen stellar object, clear differences in performance of the imagers are identifiable.</description><subject>Algorithms</subject><subject>Astronomy</subject><subject>Astronomy - instrumentation</subject><subject>Astronomy - methods</subject><subject>Computer-Aided Design</subject><subject>Earth, ocean, space</subject><subject>Equipment Design</subject><subject>Equipment Failure Analysis</subject><subject>Exact sciences and technology</subject><subject>Fundamental areas of phenomenology (including applications)</subject><subject>Fundamental astronomy and astrophysics. 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A, Optics, image science, and vision</jtitle><addtitle>J Opt Soc Am A Opt Image Sci Vis</addtitle><date>2007-04-01</date><risdate>2007</risdate><volume>24</volume><issue>4</issue><spage>1042</spage><epage>1052</epage><pages>1042-1052</pages><issn>1084-7529</issn><eissn>1520-8532</eissn><abstract>In optical aperture-synthesis imaging of stellar objects, different beam combination strategies are used and proposed. Coaxial Michelson interferometers are very common and a homothetic multiaxial interferometer is recently realized in the Large Binocular Telescope. Laboratory experiments have demonstrated the working principles of two new approaches: densified pupil imaging and wide field-of-view (FOV) coaxial imaging using a staircase-shaped mirror. We develop a common mathematical formulation for direct comparison of the resolution and noise sensitivity of these four telescope configurations for combining beams from multiple apertures for interferometric synthetic aperture, wide-FOV imaging. Singular value decomposition techniques are used to compare the techniques and observe their distinct signal-to-noise ratio behaviors. We conclude that for a certain chosen stellar object, clear differences in performance of the imagers are identifiable.</abstract><cop>Washington, DC</cop><pub>Optical Society of America</pub><pmid>17361290</pmid><doi>10.1364/JOSAA.24.001042</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Algorithms Astronomy Astronomy - instrumentation Astronomy - methods Computer-Aided Design Earth, ocean, space Equipment Design Equipment Failure Analysis Exact sciences and technology Fundamental areas of phenomenology (including applications) Fundamental astronomy and astrophysics. Instrumentation, techniques, and astronomical observations Historical astronomy and archaeoastronomy and other topics in fundamental astronomy and astrophysics instrumentation, techniques, and astronomical observations Image Enhancement - instrumentation Image Enhancement - methods Image forming and processing Image Interpretation, Computer-Assisted - instrumentation Image Interpretation, Computer-Assisted - methods Imaging and optical processing Imaging, Three-Dimensional - instrumentation Imaging, Three-Dimensional - methods Instruments, apparatus, components and techniques common to several branches of physics and astronomy Interferometers Interferometry - instrumentation Interferometry - methods Optical instruments, equipment and techniques Optics Physics Reproducibility of Results Sensitivity and Specificity |
| title | Optimum synthetic-aperture imaging of extended astronomical objects |
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