26 February 2004 Metrology of focusing gratings and continuous phase plates for LIL and LMJ lasers
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French Megajoules laser (LMJ) and Ligne d'Integration Laser (LIL) are two high power lasers using large diffractive components for focal spot conditioning. Those components are a 420x470 mm2 focusing grating and a 398x383 mm2 continuous phase plate (CPP), both working at wavelength 0.351 μm. In order to control the tight specifications that have to meet those components, CEA and company Jobin-Yvon, in charge of their manufacturing, have developed specific setups. After a brief introduction describing specifications and requirements, we will present the different setups and analysis software used and finally discuss the different measurements that could be done.
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Vincent Beau, Vincent Beau, Denis Valla, Denis Valla, Jerome Daurios, Jerome Daurios, Jerome Neauport, Jerome Neauport, Geraud de Villele, Geraud de Villele, Jean Flamand, Jean Flamand, } "Metrology of focusing gratings and continuous phase plates for LIL and LMJ lasers", Proc. SPIE 5252, Optical Fabrication, Testing, and Metrology, (26 February 2004); doi: 10.1117/12.512829; https://doi.org/10.1117/12.512829

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