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Proceedings Paper

Designing null phase screens to test a fast plano-convex aspheric lens
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Paper Abstract

We have obtained a formula to represent the wavefront produced by a plano-convex aspheric lens with symmetry of revolution considering a plane wavefront propagating parallel to the optical axis and impinging on the refracting surface, it is called a zero-distance phase front, being it the first wavefront to be out of the optical system. Using a concept of differential geometry called parallel curves it is possible to obtain an analytic formula to represent the wavefront propagated at arbitrary distances through the optical axis. In order to evaluate qualitatively a plano-convex aspheric lens, we have modified slightly an interferometer Tywman-Green as follow: In the reference beam we use a plane mirror and the beam of test we have used a spatial light modulator (SLM) to compensate the phase produced by the lens under test. It will be called a null phase interferometer. The main idea is to recombine both wavefronts in order to get a null interferogram, otherwise we will associate the patterns of the interferogram to deformations of the lens under test. The null phase screens are formed with concentric circumferences assuming different gray levels printed on SLM.

Paper Details

Date Published: 27 August 2015
PDF: 8 pages
Proc. SPIE 9575, Optical Manufacturing and Testing XI, 95751G (27 August 2015); doi: 10.1117/12.2188825
Show Author Affiliations
Jesús DelOlmo-Márquez, Univ. Nacional Autónoma de México (Mexico)
Diana Castán-Ricaño, Univ. Nacional Autónoma de México (Mexico)
Maximino Avendaño-Alejo, Univ. Nacional Autónoma de México (Mexico)
Rufino Díaz-Uribe, Univ. Nacional Autónoma de México (Mexico)

Published in SPIE Proceedings Vol. 9575:
Optical Manufacturing and Testing XI
Oliver W. Fähnle; Ray Williamson; Dae Wook Kim, Editor(s)

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