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File:Fresnel lens focal length.png: Difference between revisions

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Latest revision as of 13:53, 31 October 2017

A Fresnel lens focal length (f) and diameter is (φ). (Image: Davis and Kühnlenz, 2007)

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current13:53, 31 October 2017Thumbnail for version as of 13:53, 31 October 2017415 × 226 (37 KB)Paulo Pacheco (talk | contribs)

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