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Proceedings Paper

Accuracy of the optical testing of a fast aspheric concave surface through null-screens
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Paper Abstract

We report the qualitative testing of a spherical concave surface with deformation coefficients based on the null-screen principles. The design of cylindrical null screen with curved grid is described; its image, which is formed by reflection on the test surface, becomes an exact square grid if the surface is perfect. Any departure from this geometry is indicative of defects on the surface. In contrast to others tests, here the whole surface is tested at once. The surface under test is 140 mm in diameter and a radius of curvature of 97 mm. The surface is testing during the manufacturing process; departures from the design surface will be analyzed and discussed.

Paper Details

Date Published: 18 November 2013
PDF: 6 pages
Proc. SPIE 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications, 87852Y (18 November 2013); doi: 10.1117/12.2025722
Show Author Affiliations
Manuel Campos-García, Univ. Nacional Autónoma de México (Mexico)
Fermín Granados-Agustín, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
Elizabeth Percino-Zacarías, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
Amilcar Estrada-Molina, Univ. Nacional Autónoma de México (Mexico)
Víctor Iván Moreno-Oliva, Univ. del Istmo (Mexico)
Agustín Santiago-Alvarado, Univ. Technológica de la Mixteca (Mexico)
Maximino Avendaño-Alejo, Univ. Nacional Autónoma de México (Mexico)


Published in SPIE Proceedings Vol. 8785:
8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications
Manuel Filipe P. C. Martins Costa, Editor(s)

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