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Proceedings Paper

Ronchi test with equivalent wavelength
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Paper Abstract

The Ronchi test has been consolidated as one of the most successful and powerful techniques applied to determine the quality of optical surfaces.5 In recent years, the development and availability of LCD's (Liquid Crystal Displays) have allowed the incorporation of LCD's instead of the traditional static ruling. The easy change of the characteristics of the fringes in the ruling, such as frequency, position, and geometrical form, transformed this technique into a dynamic test.1, 8 Its physical interpretation fully connected with a lateral sheared interferometer 5, 6 and some concepts and results associated with the interferometric concept of equivalent wavelenght have been applied in this proposal for the evaluation of optical surfaces. The procedure described here to evaluate an optical surface uses the Ronchi test with the equivalent wavelenght.6, 10 This is achieved by registering and computing Ronchigrams obtained by employing, separately, two distinct wavelengths. For a particular mirror, some results are shown in order to demonstrate the enhancement of the test with this proposal.

Paper Details

Date Published: 18 February 2010
PDF: 9 pages
Proc. SPIE 7584, Laser Applications in Microelectronic and Optoelectronic Manufacturing XV, 758418 (18 February 2010); doi: 10.1117/12.846932
Show Author Affiliations
Anmi García-A., Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
Fermín Solomon Granados-A., Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
Alejandro Cornejo-R., Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)


Published in SPIE Proceedings Vol. 7584:
Laser Applications in Microelectronic and Optoelectronic Manufacturing XV
Hiroyuki Niino; Michel Meunier; Bo Gu; Guido Hennig; Jan J. Dubowski, Editor(s)

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