The Solar Dome :
First light of the CCD camera in H-alpha
Tuesday, 21th of May, 2002.
After so many delays, here it is!
The first numerical solar image in H-alpha light taken with the ROB
solar telescope. Over the last two weeks, the construction work
proceeded fairly smoothly thanks to Mr. Renders for mechanical work and
to Mr. Dufond for all the rest. After a last-minute surprise due to a
parasitic transmittance of the Lyot filter in the near-infrared, this
problem was temporarily fixed with the material at hand.
The chromospheric image shown here is a simple raw colorized image. Even
the orientation was not put right yet. This is an initial but very
encouraging attempt. Pointing and focusing adjustements must still be
done. Some mechanical parts must also be manufactured to attach the IR
blocking filter as well as a focal reducer in white-light. I hope that
this will be done soon and that we will enter the regular image
(Instrument design: F. Clette; control software: N. Debroux, F. El Hassouni, J. Nutin)