Catoptric

From International Dictionary of Marine Aids to Navigation
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2-2-065

The property of those optical elements which alter the direction of a light ray from its original direction by reflection only. (Figs, 11b and 13)




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