Difference between revisions of "Drum Lens"
m (1 revision)
Revision as of 01:00, 25 February 2009
(Dioptric) Drum Lens
A fixed lens consisting of dioptric elements only. (Fig. 16b)
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
[[Category:2.2 Optical Apparatus]
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM