Physics – Optics
Scientific paper
Feb 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996spie.2730..474s&link_type=abstract
Proc. SPIE Vol. 2730, p. 474-479, Second Iberoamerican Meeting on Optics, Daniel Malacara-Hernandez; Sofia E. Acosta; Ramon Rodr
Physics
Optics
Scientific paper
A telescope was needed that would fit into the cramped quarters of an earth orbiting satellite and also be light in weight. The first requirement dictated that the system had to be folded; the second made undesirable any system of planar folding mirrors. My solution was to use a pair of confocal conic mirrors but with their axes subtending a predetermined angle. This made it possible to arrange the mirrors, more or less, to fit the available space. I've called this kind of system a Schiefspiegler after a book describing similar telescope designs. At this point the system consists of a pair of confocal conic mirrors, prolate spheroids to be precise, whose axes subtend an angle (beta) and that intersect at the common focus. The other parameters are the two eccentricities, (epsilon) 1 and (epsilon) 2, the two vertex radii of curvature r1 and r2.
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