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14 November 2001 Development of a thin substrate for x-ray telescope
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Abstract
Walter Type-I optics, which reflect X-rays twice with their confocal paraboloidal and hyperboloidal reflectors, have commonly been used in X-ray astronomy. These two reflectors usually consist of two thin substrates with conical shapes in order to obtain a large effective area above 2 keV. However, such telescopes tend to have poorer imaging quality due to approximation to conical shapes and misalignment of the two substrates. In order to reduce the degeneration in the imaging quality, we formed two reflectors from one thin substrate. The accuracy of the angle between two reflectors is determined by the tolerance of the mandrel used to form the thin foil substrate. At RIKEN we make the mandrel using a precision processing method. Here we present the results of our preliminary experiment on substrate forming.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hisamitsu Awaki, Yuzuru Tawara, Yasushi Ogasaka, Hideyo Kunieda, Hitoshi Ohmori, Hiromichi Honda, and Susumu Shioya "Development of a thin substrate for x-ray telescope", Proc. SPIE 4501, X-Ray Mirrors, Crystals, and Multilayers, (14 November 2001); https://doi.org/10.1117/12.448500
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