17 September 2008 Continuous phase plate polishing using magnetorheological finishing
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Magnetorheological Finishing (MRF) techniques and tools have been developed to imprint complex, continuously varying topographical structures onto 430 x 430 millimeter optical surfaces. These optics, known as continuous phase plates (CPPs) are important for kilojoule- and megajoule-class laser systems requiring precise control of beam-shape, energy distribution and wavefront profile. MRF's sub-aperture polishing characteristics make it possible to imprint complex computer generated topographical information at spatial scale-lengths approaching 1 millimeter and surface peak-to-valleys as high as 22 micrometers to within 30 nanometers of design specifications. This paper presents the evolution of MRF imprinting technology for manufacturing large-aperture CPPs.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. Tricard, P. Dumas, J. Menapace, "Continuous phase plate polishing using magnetorheological finishing", Proc. SPIE 7062, Laser Beam Shaping IX, 70620V (17 September 2008); doi: 10.1117/12.797996; https://doi.org/10.1117/12.797996

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