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| Fres·nel lens [ frə nél lènz ] (plural Fres·nel lens·es) |
noun |
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| Definition: |
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thin lens with high magnification: a thin lens of short focal length with a surface consisting of concentric rings, each having a curvature corresponding to a similar ring of a plain convex lens
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| [Mid-19th century. After Augustin-Jean Fresnel (1788-1827), French physicist] |
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