Null ronchi test for aspherical surfaces.
A new kind of null Ronchi test for aspherical surfaces is devised using a special ruling with curved lines. This test is found to be more advantageous for aspherical surfaces that the normal Ronchi test, which depends solely on computation to determine the shape of the fringes on the surface. The only restriction on this test is that a point source must be used.
Malacara
D
D
Cornejo
A
A