Michael I. Andersen Astrophysikalisches Institut Potsdam. Aligning robotic telescopes within the inversion layer (the life of the robotic optician). The challenge I. The seeing is fantastic! 0.27” median above the inversion layer (Lawrence et al. 2004) Is the telescope fantastic?
Michael I. Andersen
Astrophysikalisches Institut Potsdam
The seeing is fantastic!
0.27” median above the inversion layer
(Lawrence et al. 2004)
Is the telescope fantastic?
(to utilize the best seeing, the telescope essentially must be diffraction limited)
The optician goes home with the last flight.
There is no dark time to test and align.
The temperature is completely wrong.
There are 50 working days per season.
→ passive design with self compensation
Good optical quality mirror and good passive mirror support (corrector less important).
Passive focus compensation
(Aluminum + Aluminum)
(Carbon fibre + CeSic (ΔCTE <2 x 10^-7) )
(Carbon fibre + Zerodur (ΔCTE <few x 10^-7) )
(defocussed bright star fainter than sky)
(test on-sky before shipping)
(large flat mirror or collimator)
2.5mactive opticsF/2 primary
is an issue)
Your science goals must
and will drive the choice of
solutions for your project!