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26 February 2004 LIL fused silica lenses and thin flat plates production
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Abstract
As part of LMJ project (Laser Megajoule), CEA has built the LIL - Ligne d'Integration Laser - a LMJ prototype. This prototype uses full sized optics (400x400 mm2) with very tight specifications. SESO is one of the suppliers of optical components for this laser, among them filtering lenses - called L3 and L4 - used at 1053 nm (1ω), thin flat plates - continuous phase plates and debrishield - and thick windows, all used at 351 nm (3ω). All these optics are in fused silica and combine good wavefront specifications, very low roughness and no or few surface quality defects. Today, including spare parts, about 40 components have been produced. The purpose of this paper is to describe the facilities for grinding, polishing and finishing these optics. Computer Controlled Polishing robot for lenses Double side polishing machine for flat optics After a brief presentation of the specific metrology used, we give a detailed overview of the performances obtained on the produced components. This work is related to the LIL - LMJ project directed by CEA, France.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jean-Jacques Ferme, Denis Valla, Nathalie Ferriou-Daurios, Jerome Neauport, and Vincent Beau "LIL fused silica lenses and thin flat plates production", Proc. SPIE 5252, Optical Fabrication, Testing, and Metrology, (26 February 2004); https://doi.org/10.1117/12.514269
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