Cassegrainian telescope
https://w3id.org/framester/wn/wn30/instances/synset-Cassegrainian_telescope-noun-1 <https://w3id.org/framester/wn/wn30/schema/NounSynset>
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Cassegrainian telescope
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02978478-n
Cassegrainian telescope
Gregorian telescope
102400390
102872374
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0
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a reflecting telescope that has a paraboloidal primary mirror and a hyperboloidal secondary mirror; light is brought to a focus through an aperture in the center of the primary mirror
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102978478