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Applied Optics

Applied Optics


  • Vol. 27, Iss. 8 — Apr. 15, 1988
  • pp: 1423–1429

ROSAT wide field camera mirrors

R. Willingale  »View Author Affiliations

Applied Optics, Vol. 27, Issue 8, pp. 1423-1429 (1988)

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The ROSAT wide field camera (WFC) is an XUV telescope operating in the 12–250-eV energy band. The mirror system utilizes Wolter-Schwarzschild type I (WS I) grazing incidence optics with a focal length of 525 mm, comprised of three nested aluminum shells with an outermost diameter of 576 mm providing a geometric aperture area of 456 cm2. The reflecting surfaces are electroless nickel plated and coated with gold to enhance their reflectivity in the XUV. The mirrors have undergone full aperture optical testing, narrow beam XUV testing, and full aperture XUV testing. Measurements of the reflectivity are compared to theoretical values derived from the optical constants of gold in the XUV range. Analysis of the focused distribution is used to estimate the surface roughness and figuring errors of the polished surfaces. The results are compared to the mechanical metrology data collected during manufacture of the shells and the power spectral density of the reflecting surfaces is found to have a power-law form.

© 1988 Optical Society of America

Original Manuscript: August 18, 1987
Published: April 15, 1988

R. Willingale, "ROSAT wide field camera mirrors," Appl. Opt. 27, 1423-1429 (1988)

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  1. R. C. Chase, L. P. VanSpeybroeck, “Wolter-Schwarzchild Telescopes for X-Ray Astronomy,” Appl. Opt. 12, 1042 (1973). [CrossRef] [PubMed]
  2. M. A. Barstow, R. Willingale, B. J. Kent, A. Wells, “Early Performance Data from the ROSAT XUV Wide Field Camera,” Opt. Acta 32, 197 (1985). [CrossRef]
  3. M. A. Barstow, G. W. Fraser, S. R. Milward, “Imaging Microchannel Plate Detectors for XUV Sky Survey Experiments,” paper presented at meeting on X-Ray Instrumentation in Astronomy, Cannes (2–4 Dec. 1985).
  4. R. Willingale, S. R. Milward, M. R. Sims, “XUV Reflectivity Measurements on the ROSAT WFC Mirrors,” paper presented at BESSY/SPIE meeting on Soft X-Ray Optics and Technology, Berlin (Dec. 1986).
  5. B. Aschenbach, H. Brauninger, K. H. Stephan, J. Trumper, “X-Ray Test Facilities at MPE Garching,” Proc. Soc. Photo-Opt. Instrum. Eng. 184, 234 (1979).
  6. B. L. Henke, P. Lee, J. Tanaka, R. L. Shimbukuro, B. K. Fujikawa, “Low-Energy X-Ray Interaction Coefficients: Photoabsorption, Scattering and Reflection. E = 100-2000 eV Z = 1–94,” At. Data Nucl. Data Tables 27, No 1 (1982). [CrossRef]
  7. H.-J. Hagemann, W. Gudat, C. Kunz, “Optical Constants from the Far Infrared to the X-Ray Region,” DESY Report SR-74/7 (May1974).
  8. R. O. Rice, “Reflection of Electromagnetic Waves from Slightly Rough Surfaces,” Commun. Pure Appl. Math. 351, 4 (1951).
  9. P. Beckmann, A. Spizzichino, The Scattering of Electromagnetic Waves from Rough Surfaces (Pergamon, New York, 1963).
  10. H. Kunieda et al., “Roughness Measurement of X-Ray Mirror Surfaces,” Jpn. J. Appl. Phys. 25, 1292 (1986). [CrossRef]

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