Definition of normal congruence

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DataRay Inc. - ISO 11146-Compliant Laser Beam Profilers

Photonics Dictionary

normal congruence: Condition in which a perpendicular surface can be discovered for every ray in a group. This condition is commonly observed when rays emerge from a point source or object that is placed at the center of curvature of a spherical mirror.

PI Physik Instrumente - Microscope Stages MR ROS 11/24

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