- aberration of sphericity
- aberração esférica (optics)
English-Portuguese dictionary of military terminology. 2014.
aberration of sphericity
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aspheric — [ā΄sfir′ik] adj. designating or of a lens or mirror made so that it is not perfectly spherical, as to minimize spherical aberration: also aspherical * * * a·spher·ic (ā sfîrʹĭk, ā sfĕrʹ ) also a·spher·i·cal ( ĭ kəl) adj. Varying slightly from… … Universalium
Cassegrain reflector — ▪ astronomical instrument in astronomical telescopy, an arrangement of mirrors to focus incoming light at a point close to the main light gathering mirror. The design was proposed in 1672 by French priest Laurent Cassegrain. In the… … Universalium
