Difference between revisions of "Focal Plane (of a light)"

From International Dictionary of Marine Aids to Navigation
Jump to navigation Jump to search
m (1 revision)
m (1 revision)
 
(One intermediate revision by the same user not shown)
(No difference)

Latest revision as of 11:01, 1 March 2009

2-2-170

The horizontal plane through the focus of the optical apparatus of the light.

Ch2 Fig10.jpg


Note: In lighthouse practice in some countries the term "focal plane" is used with the above meaning, although this is quite a different meaning from that of 2-2-165.




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