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oai:docta.ucm.es:20.500.14352/442772023-08-27T21:09:27Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense author Salgado Remacha, Francisco Javier author Torcal Milla, Francisco José author Sánchez Brea, Luis Miguel author Bernabeu Martínez, Eusebio 2023-06-20T03:42:09Z 2023-06-20T03:42:09Z 2011-03 0143-8166 10.1016/j.optlaseng.2010.10.009 https://hdl.handle.net/20.500.14352/44277 http://dx.doi.org/10.1016/j.optlaseng.2010.10.009 http://www.sciencedirect.com Steel tape is used in optical applications due to its mechanical properties. However, roughness of steel surfaces affects to wave propagation. The effect can be observed using diffraction gratings with low periods. In such a case, self-images of the grating appear at certain periodic distances from the grating (Talbot planes). When standard steel is used, the contrast of Talbot self-images strongly decreases with the distance from the grating. In this work, we prove that controlling the surface quality of steel, it is possible to improve its optical behavior and, as a consequence, high quality surface steel represents a good choice for diffractive optics when the use of chrome-on-glass masks is not indicated. As an example, we have manufactured a diffraction grating over a high quality steel surface by means of an ablation process with a nanosecond pulsed laser. The contrast of the self-images for these gratings decreases very slowly with the distance, in comparison with the self-images obtained with standard steel tape gratings. eng Use of steel substrates in diffractive optics: Near field of high surface quality steel tape gratings journal article URL https://docta.ucm.es/bitstreams/f5a3e5d9-c927-4d24-929f-43ce71996886/download File MD5 fc5af534e59d3585a01e0cf869113b8c 790226 application/pdf Bernabeu,E10.pdf