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Proceedings Paper

Continuous phase plate polishing using magnetorheological finishing
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Paper Abstract

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.

Paper Details

Date Published: 17 September 2008
PDF: 8 pages
Proc. SPIE 7062, Laser Beam Shaping IX, 70620V (17 September 2008); doi: 10.1117/12.797996
Show Author Affiliations
M. Tricard, QED Technologies (United States)
P. Dumas, QED Technologies (United States)
J. Menapace, Lawrence Livermore National Labs. (United States)


Published in SPIE Proceedings Vol. 7062:
Laser Beam Shaping IX
Andrew Forbes; Todd E. Lizotte, Editor(s)

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