WHAT YOU NEED A FOUCAULT TESTER: For those who still do not know; It serves to apply the Foucault test on an optical surface, parabolica, reflective, under construction, to infer the fixes to be implemented in order to bring it in to a most high quality. Given that in a parabolic mirror, the radius of curvature of the surface increases … Continue reading Building and using the Foucault tester by “Texereau type”