From Event: SPIE Optical Engineering + Applications, 2019
A method to design Ronchi-Hartmann screens for testing a fast plano-convex aspherical Fresnel lens is presented. We design null screens that produce either aligned straight fringes or quasi-angular spots arrays for observed patterns. The designs of these null screens are based on knowledge of the caustic by refraction through arbitrary curves. A qualitative test for a Fresnel lens is presented.
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Maximino Avendaño-Alejo, Martín Jiménez-Rodríguez, Gabriel Castillo-Santiago, and María C. López-Bautista, "Implementation of a qualitative test for a Fresnel lens," Proc. SPIE 11120, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XVI, 1112008 (Presented at SPIE Optical Engineering + Applications: August 11, 2019; Published: 9 September 2019); https://doi.org/10.1117/12.2529787.