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spherical aberration |
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spherical aberration: see aberration aberration, in optics, condition that causes a blurring and loss of clearness in the images produced by lenses or mirrors. Of the many types of aberration, the two most significant to the lens maker are spherical and chromatic. ..... Click the link for more information. , in optics. spherical aberration [′sfir·ə·kəl ‚ab·ə′rā·shən] (optics) Aberration arising from the fact that rays which are initially at different distances from the optical axis come to a focus at different distances along the axis when they are reflected from a spherical mirror or refracted by a lens with spherical surfaces. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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This procedure is "the worst [type of eye surgery] in terms of introducing spherical aberration," says Howland. A molded glass aspheric lens has two advantages over a multi-element lens, first, the aspheric design reduces spherical aberration and coma in a single element, and second, with fewer optical surfaces required, overall light transmission is higher," states Emily Kubacki, Optics Product Manager. Weiler, repairs made by astronauts last month have corrected the spherical aberration in Hubble's primary mirror, making the telescope the worldclass observatory astronomers had always hoped for. |
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