Focal Plane (of a lens or focusing reflector)
2-2-165
The plane normal to the optical axis of the lens or reflector and containing the focus.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
2-2-165
The plane normal to the optical axis of the lens or reflector and containing the focus.
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