Physics – Optics
Scientific paper
Jan 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979spie..184..167h&link_type=abstract
In: Space optics: Imaging X-ray optics workshop; Proceedings of the Seminar, Huntsville, Ala., May 22-24, 1979. (A80-17469 05-89
Physics
Optics
1
Measuring Instruments, Metrology, Mirrors, X Ray Telescopes, Design Analysis
Scientific paper
The measuring equipment has been designed and constructed for testing the directrix of Wolter-type telescope mirrors. Due to the high accuracy required its design is based on the principles of industrial metrology and has been adapted to the specific problems encountered with the Wolter-type telescope. Measurement is carried out by an inductive probe which, as a result of its low contact pressure, can also be used on polished surfaces. The meridian curve is compared with a test glass of optimum spherical surface so that deviations in the order of 1/100 micron can be detected. A digital scale is used to localize the contact points measured in mirror axis direction. In the final version, the two measured values obtained are fed into a calculator for nominal/actual comparison. The differences obtained between directrix and test glass are compared with the nominal values already stored in the calculator and the resulting deviations then recorded on an analog recorder.
Heynacher E.
Reinhardt D.
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