focal plane

Show Summary Details

Quick Reference

A flat surface at right angles to the optical axis of a lens or mirror which contains the image of a small, distant object and also the focal point. If an extended image lies not in a plane but on a curved surface because of curvature of field, it is said to be formed on the focal surface or Petzval surface.

Subjects: Astronomy and Astrophysics.

Reference entries

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.