polar telescope

polar telescope

[′pō·lər ′tel·ə‚skōp]
(optics)
A telescope which uses rotating mirrors to enable celestial objects to be observed through a fixed eyepiece.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The outgrowth of numerous discussions with other eclipse photographers, especially my colleague Roger Sinnott, and past experiences, it's a variant of a polar telescope fed by a siderostat.
One downside of a fixed polar telescope, however, is that the sky appears to slowly rotate at the focal plane, but this is of little concern during the brief exposures used for an eclipse.
The polar telescopes gain their extreme sensitivity, in part, by being located at the coldest, driest place on Earth.