focal plane (English, noun)
expansion: focal plane (plural focal planes)
Senses:
topics: engineering
natural-sciences
optics
physical-sciences
physics
glosses: Any plane perpendicular to the axis of a lens or mirror.
topics: engineering
natural-sciences
optics
physical-sciences
physics
glosses: Such a plane, in a camera, microscope etc, in which the real image is in focus.
Forms:
form: focal planes
tags: plural