focal plane
focal plane · focal planes
Any plane perpendicular to the axis of a lens or mirrorAny plane perpendicular to the axis of a lens or mirror.
Meaning
2 sensesAny plane perpendicular to the axis of a lens or mirror.
Such a plane, in a camera, microscope etc, in which the real image is in focus.
Forms
plural: focal planes| Singular | focal plane |
|---|---|
| Plural | focal planes |
regular