Wolter type I x-ray telescope

Wolter type I x-ray telescope

[¦wȯl·tər ‚tīp ‚wən ¦eks‚rā ′tel·ə‚skōp]
(astronomy)
A telescope that uses mirrors that form two surfaces of revolution, a paraboloid and a hyperboloid, to reflect incident x-rays to a common focus.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.