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Proceedings Paper

Testing conical surfaces using digital superposition of Ronchi-grams
Author(s): B. Cabrera-Perez; J. Castro-Ramo; Alfonso Padilla-Vivanco; Alberto Cordero-Davila
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Paper Abstract

In optical workshops, Ronchi test is used to determine the optical quality of any concave surface while the surface is in the polishing process its quality is verified based on the technician experience. We describe a method based on digital image superposition between a real Ronchigram with an ideal obtained by a computer simulation program. The real Ronchigram image is processed by an erosion algorithm to obtain its skeleton. We supposed a linear relationship between the separation of each fringe for both experimental and ideal fringes, to obtain in this way the desired surface. Such method allows us to compute in a direct way the transversal aberration of the surface under test.

Paper Details

Date Published: 21 October 2004
PDF: 6 pages
Proc. SPIE 5622, 5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications, (21 October 2004); doi: 10.1117/12.591734
Show Author Affiliations
B. Cabrera-Perez, Instituto Nacional de Astrofisica, Optica y Electronica (Mexico)
J. Castro-Ramo, Instituto Nacional de Astrofisica, Optica y Electronica (Mexico)
Alfonso Padilla-Vivanco, Instituto Nacional de Astrofisica, Optica y Electronica (Mexico)
Alberto Cordero-Davila, Instituto Nacional de Astrofisica, Optica y Electronica (Mexico)


Published in SPIE Proceedings Vol. 5622:
5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications
Aristides Marcano O.; Jose Luis Paz, Editor(s)

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