Definition of principal plane

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PI Physik Instrumente - Microscope Stages LB ROS 11/24

Photonics Dictionary

principal plane

In a lens or lens system, that surface at which the projections of an entering and exiting ray intersect. Also known as the equivalent refracting surface, the principal plane is most often not actually a plane but rather a curved surface.

Zurich Instruments AG - Challenge Us 10/24 MR

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