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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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:52, 28 February 2009 | | 957 × 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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