Modified telescope alignment procedure for improving the beam quality of the CHARA Telescopes

Details Modified telescope alignment procedure for improving the beam quality of the CHARA Telescopes Modified telescope alignment procedure for improving the beam quality of the CHARA Telescopes

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010spie.7734e.131s&link_type=abstract

Optical and Infrared Interferometry II. Edited by Danchi, William C.; Delplancke, Françoise; Rajagopal, Jayadev K. Proceeding

Physics

Scientific paper

We present the procedure used to optically align the CHARA telescopes. We show that the beam quality, delivered by the CHARA telescopes E1, E2 and W2, is significantly better now than in 2008. RMS wavefront error is about 200 nm. The astigmatism observed in W1 is more likely due to a combination of a mechanical problem in the mounting and misalignment. We present wavefront quality results from four telescopes. Further beam quality improvements can be expected when the second part of the alignment procedure (tuning) will be carried out later this year.

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