21 October 2004 Testing conical surfaces using digital superposition of Ronchi-grams
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Proceedings Volume 5622, 5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications; (2004) https://doi.org/10.1117/12.591734
Event: 5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications, 2004, Porlamar, Venezuela
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.
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B. Cabrera-Perez, J. Castro-Ramo, Alfonso Padilla-Vivanco, Alberto Cordero-Davila, "Testing conical surfaces using digital superposition of Ronchi-grams", 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; https://doi.org/10.1117/12.591734
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