NASA NTRS · 19860004564
Test method for telescopes using a point source at a finite distance
Abstract
A test method for telescopes that makes use of a focused ring formed by an annular aperture when using a point source at a finite distance is evaluated theoretically and experimentally. The results show that the concept can be applied to near-normal, as well as grazing incidence. It is particularly suited for X-ray telescopes because of their intrinsically narrow annular apertures, and because of the largely reduced diffraction effects.
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Griner, D. B., Zissa, D. E., Korsch, D.. 1985-09-01. Test method for telescopes using a point source at a finite distance. https://ntrs.nasa.gov/citations/19860004564
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