Abstract

A method for increasing the precision and sensitivity of the quantitative evaluation of fast aspheric surfaces through the null screen method is presented. This consists of applying small displacements to the cylindrical null screen along the optical axis. These movements allow a scan of the image spots over zones that with the analysis of a single image are more difficult to evaluate. The precision of the test is increased due to a greater density of sampling reducing the numerical errors during the integration. Results of the evaluation of an elliptical concave mirror on axis show that the numerical integration errors can be reduced from 20% for short paths to 80% for larger integration paths.

© 2008 Optical Society of America

Testing fast aspheric concave surfaces with a cylindrical null screen

M. Campos-García, R. Bolado-Gómez, and R. Díaz-Uribe
Appl. Opt. 47(6) 849-859 (2008)

Improving fast aspheric convex surface tests with dynamic null screens using LCDs

Manuel Campos-García, Víctor Iván Moreno-Oliva, Rufino Díaz-Uribe, Fermín Granados-Agustín, and Agustín Santiago-Alvarado
Appl. Opt. 50(19) 3101-3109 (2011)

Null-screen testing of fast convex aspheric surfaces

Rufino Díaz-Uribe and Manuel Campos-García
Appl. Opt. 39(16) 2670-2677 (2000)

General equations for the null-screen test for aspherical surfaces with deformation coefficients

Daniel Aguirre-Aguirre, Manuel Campos-García, Rufino Díaz-Uribe, and Brenda Villalobos-Mendoza
Appl. Opt. 57(35) 10230-10238 (2018)

Surface shape evaluation with a corneal topographer based on a conical null-screen with a novel radial point distribution

Manuel Campos-García, Cesar Cossio-Guerrero, Víctor Iván Moreno-Oliva, and Oliver Huerta-Carranza
Appl. Opt. 54(17) 5411-5419 (2015)