An unusual aberration of very large liquid mirror telescopes.

Details An unusual aberration of very large liquid mirror telescopes. An unusual aberration of very large liquid mirror telescopes.

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...297l..53r&link_type=abstract

Astronomy and Astrophysics, v.297, p.L53

Astronomy and Astrophysics

Astrophysics

4

Liquid Mirrors, Telescopes

Scientific paper

Large Liquid Mirror telescopes, and any other telescope rotating around the line of sight, like altazimuth ones, are affected by a small blurring due to the light aberration when the light is reflected by the moving edges of the mirror. For ground-based liquid mirrors such effect dominates over the diffraction size for diameter of the order of some tens of meters, at optical wavelength and for reasonable choices of the focal length. The same effect, for an altazimuth telescope, appears negligible. Also a fundamental limitation on the spectral resolution attainable by a spectrograph coupled with such a telescope is pointed out, but it appears negligible by several order of magnitudes.

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