File:Ch2 Fig18.jpg

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2-2-215 N DIRECTIONAL DRUM LENS illustrating the principle of a CONVERGED BEAM 2-2-215 ( in the absence of the converging prisms a 360° fan beam of nearly uniform intensity would be produced)

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current19:52, 28 February 2009Thumbnail for version as of 19:52, 28 February 2009957 × 422 (65 KB)Oferiks (talk | contribs)2-2-215 N DIRECTIONAL DRUM LENS illustrating the principle of a CONVERGED BEAM 2-2-215 ( in the absence of the converging prisms a 360° fan beam of nearly uniform intensity would be produced)

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