May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.344..243s&link_type=abstract
In ESA, Solar Physics and Astrophysics at Interferometric Resolution p 243-246 (SEE N93-10901 01-90)
Physics
2
Image Reconstruction, Interferometry, Optical Paths, Space Observations (From Earth), Stellar Physics, Telescopes, Angular Resolution, Data Processing, Delay, High Resolution, Light (Visible Radiation), Synthetic Apertures
Scientific paper
The concept and current status of CHARON (Calern High Angular Resolution Optical Network), a French ground based imaging stellar interferometer project to provide two dimensional high resolution images by aperture synthesis at visible wavelengths, are discussed. CHARON is a prototype intended to demonstrate the feasibility of phase closure with independent telescopes. The instrument consists of three 26 cm telescopes movable on 100 m baselines and three optical delay lines to compensate the optical paths. The recombining optics included a three channel image tracker and a fringe tracker. The image reconstruction is done by an original method including bispectral analysis and avoiding the use of any a priori model. CHARON is also a test bench for some aspects of the interferometric mode of the very large telescope. The first visibility measurements with two telescopes and two delay lines are reported.
Cruzalèbes Pierre
Menardi Serge
Rabbia Yves
Schumacher Georg
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