Foucault knife-edge test - Wikipedia

Modeling of Foucault Knife-Edge Test

Going parabolic: The difference between a Ronchi, Foucault, and a Caustic test

Automatic Foucault test method based on transverse cutting at two different axial positions near the foci

Foucault (Knife-Edge) Test

Mike Lockwood's Foucault Testing Hall of Shame

Understanding Foucault: A Primer for Beginners

File:Foucault-Test 2.jpg - Wikipedia

1. Foucault method for testing a lens.

Léon Foucault - Wikipedia

Schlieren - Wikiwand

Parabolizing a Telescope Mirror

Knife Edge Test for Lens Evaluation

Parabolizing a Telescope Mirror

Foucault test: a quantitative evaluation method