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conoid of Sturm |
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Sturm, conoid of The bundle of rays formed by an astigmatic optical system consisting of a primary focal line (called Sturm's line), a circle of least confusion and a secondary focal line (Sturm's line) perpendicular to the first. See astigmatism; circle of least confusion. 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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