Difference between revisions of "Drum Lens"

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Revision as of 13:00, 25 February 2009

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(Dioptric) Drum Lens

A fixed lens consisting of dioptric elements only. (Fig. 16b)

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Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM