Stepped Lens

From International Dictionary of Marine Aids to Navigation
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2-2-130

A lens or fixed lens of dioptric elements only, having a profile of stepped shape.




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

Languages

English

[[Category:2.2 Optical Apparatus]

ampere

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

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