Stargazers pp 110-110 | Cite as

Using an Image-Intensifier in Astronomy

  • Thierry Midavaine
Conference paper


The use of an RTC XX 1390 second-generation intensifier (which consists of a S20R photocathode, a micro-channel plate and a screen) was described. In visual work, very faint objects become visible. Photographically, an 18th-magnitude object has been detected through a layer of cirrus. The effective focal length used was 20 m, giving a resolution of 1 arcsecond, thanks to the short exposure times needed. With a Celestron C8 telescope, the coma of Comet Halley was photographed with 2-second exposures, allowing transitory phenomena to be detected. Used in conjunction with video techniques, high time-resolution images could be obtained, opening up the possiblity of new forms of observation of faint objects.




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Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • Thierry Midavaine
    • 1
  1. 1.Appt. 1199ParisFrance

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