In this work, we present the null-screen design for testing the shape of freeform surfaces. To validate the proposed method, we calculated the null-screen for the Zernike surface (n=3, m=-3), with a peak to valley (PV) of 31.765 mm and 5.559 mm rms.
Aguirre-Aguirre, D., Villalobos-Mendoza, B., Díaz-Uribe, R., & Campos-García, M. (2019). Null-screen design for freeform surface testing. In Optics InfoBase Conference Papers (Vol. Part F173-Freeform 2019). OSA - The Optical Society. https://doi.org/10.1364/FREEFORM.2019.JW2A.5