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aberroscope |
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aberroscopeĀ Instrument for observing aberration. Such an instrument was designed by Tscherning to measure his own spherical aberration. It consists of a planoconvex lens with a grid made up of squares ruled on its plane surface. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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