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Optical Engineering

Wolter-Schwarzschild Optics For The Extreme Ultraviolet: The Berkeley Stellar Spectrometer And The EUV Explorer
Author(s): Roger F. Malina; Stuart Bowyer; David Finley; Webster Cash
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Paper Abstract

The design, fabrication and performance of two Wolter-Schwarzschild grazing incidence optics are described. Both telescopes have been figured by single point diamond turning and have achieved better than 15 arcsecond on-axis imaging. The telescope for the stellar spectrometer is an f/10 Type II system with an effective area of 225 cm2 at 250 A and 300 cm2 at 500 A. the primary has a maximum diameter of 38 cm and was fabricated in three elements. The copper-plated aluminum substrate was diamond turned; following nickel plating, the surface was polished and coated with evaporated gold. The performance during a sounding rocket flight is discussed. The pro-totype telescope for the Extreme Ultraviolet Explorer is an f/1.24 Type I system with an effective field of view of 5.0° diameter. The telescope has a maximum diameter of 40 cm and was fabricated as a single element. The aluminum substrate is to be diamond turned; the nickel plated surface will be polished and electroplated with gold. The design choice and defocusing optimization aimed at maximizing the field of view and number of image pixels is examined.

Paper Details

Date Published: 1 April 1980
PDF: 8 pages
Opt. Eng. 19(2) 192211 doi: 10.1117/12.7972495
Published in: Optical Engineering Volume 19, Issue 2
Show Author Affiliations
Roger F. Malina, University of California (United States)
Stuart Bowyer, University of California (United States)
David Finley, University of California (United States)
Webster Cash, University of Colorado (United States)

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