Wolter-Schwarzschild Optics For The Extreme-Ultraviolet: The Berkeley Stellar Spectrometer And The EUV Explorer

Roger F. Malina; Stuart Bowyer; David Finley; Webster Cash

doi:10.1117/12.957432

9 August 1979 Wolter-Schwarzschild Optics For The Extreme-Ultraviolet: The Berkeley Stellar Spectrometer And The EUV Explorer

Roger F. Malina, Stuart Bowyer, David Finley, Webster Cash

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Proceedings Volume 0184, Space Optics Imaging X-Ray Optics Workshop; (1979) https://doi.org/10.1117/12.957432
Event: 1979 Huntsville Technical Symposium, 1979, Huntsville, United States

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 Å and 300 cm2 at 500 X. 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 prototype 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 defocussing optimisation aimed at maximizing the field of view and number of image pixels is examined.

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Roger F. Malina, Stuart Bowyer, David Finley, and Webster Cash "Wolter-Schwarzschild Optics For The Extreme-Ultraviolet: The Berkeley Stellar Spectrometer And The EUV Explorer", Proc. SPIE 0184, Space Optics Imaging X-Ray Optics Workshop, (9 August 1979); https://doi.org/10.1117/12.957432

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KEYWORDS

Extreme ultraviolet

Telescopes

Polishing

Space telescopes

Spectroscopy

EUV optics

X-ray optics

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