Design, fabrication and expected performance of the HEAO-B X ray telescopeThe X-ray telescope of the second High Energy Astronomy Observatory (HEAO-B) is described. The design consists of four concentric paraboloid/hyperboloid pairs. Focal length is 3.44 meters, paraboloid diameters vary from 580-336 mm, grazing angles vary from 70 to 40 arcmin for paraxial rays, segment lengths are 511 mm. The reflecting surfaces are nickel-coated fused quartz and the resolution is limited by assembly errors (for small field angles) and design aberrations (for large field angles). The local slope, roundness, and surface roughness are identified as the primary optical tolerances connected with the individual elements.
Document ID
19780056353
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Van Speybroeck, L. P. (Smithsonian Astrophysical Observatory Cambridge, Mass., United States)