An intensified C.C.D. camera for telescope guidance
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This paper deals with the study and the fabrication of an intensified C.C.D. camera for guiding telescopes or for searching fields containing faint stars. It describes the sensor of the camera (by connecting the Thomson C.C.D. and the RTC image intensifier) and its three working modes. The first is the direct exploitation of the video signal sent to the TV monitor, in conformity with the C.C.I.R. standard (the N.T.S.C. standard is also available). However, the study of stability and sensitivity of the intensifier lead us to create a second working mode necessary for the correct detection of faint objects (by an “averaging filter” improving the signal to noise ratio). The last mode is the “integration” by the C.C.D. itself: it allows a maximum of three-seconds integration time (therefore the detection of fainter objects), with the help of a thermoelectric cooling system. Moreover, the tests made on the 1.52 meter telescope of the O.A.N. (Calar-Alto, Spain) have been successful and confirm the capabilities of this camera to replace the intensified TV tube cameras, like the super-isocon camera.
KeywordsIntegration Time Cool System Image Intensifier Video Signal Correct Detection
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- G.D.TOWLER and P.SWAINSTON, Advances in Electronics and Electron Physics, Vol 33 B, 961–978, 1972, Academic Press, London. “Assessing the performance of low light-level camera tubes”.Google Scholar
- D.G.THEODOROU and J.C.PICKELS, Advances in Electronics and Electron Physics, Vol 33 B, 979–997, 1972, Academic Press, London. “Salient sensor characteristics for low-light TV systems”.Google Scholar
- D.P. MOUSER, IEEE, Transactions on Broadcasting, Vol. BC-15, No2, June 1969. “The Image Isocon — A Low-Light Television Tube”.Google Scholar
- F.GEX, Acta Electronica 27, 3–4, 1987, 247–257 “Applications à l'astronomie de l'intensification d'image”.Google Scholar
- J.G. TIMOTHY, 1066/Optical Engineering/November/December 1985/Vol. 24, No 6 “Multianode microchannel array detector systems: performances characteristics”.Google Scholar
- CAMBION Company, Notes No 01104, Cambridge Thermionic Corporation, 445 Concord Ave., Cambridge, Mass. 02238 “Application Notes for Cambion Thermoelectric Devices”Google Scholar
- Liang-Tai George CHIU, Ap. J. Suppl. 44, 31–71, sept. 1980 ‘Classification of stellar populations and luminosity classes from accurate proper motions’.Google Scholar