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Title: Imprinting continuously varying topographical structure onto large-aperture optical surfaces using magnetorheological finishing

Abstract

Over the past four years we have advanced Magnetorheological Finishing (MRF) techniques and tools to imprint complex continuously varying topographical structures onto large-aperture (430 x 430 mm) optical surfaces. These optics, known as continuous phase plates (CPPs), are important for high-power laser applications requiring precise manipulation and control of beam-shape, energy distribution, and wavefront profile. MRF's unique deterministic-sub-aperture polishing characteristics make it possible to imprint complex topographical information onto optical surfaces at spatial scale-lengths approaching 1 mm and surface peak-to-valleys as high as 22 {micro}m. During this discussion, we will present the evolution of the MRF imprinting technology and the MRF tools designed to manufacture large-aperture 430 x 430 mm CPPs. Our results will show how the MRF removal function impacts and limits imprint fidelity and what must be done to arrive at a high-quality surface. We also present several examples of this imprinting technology for fabrication of phase correction plates and CPPs for use in high-power laser applications.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
909623
Report Number(s):
UCRL-CONF-229266
TRN: US200723%%82
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: Presented at: 7th EUSPEN International Conference, Bremen, Germany, May 20 - May 24, 2007
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 71 CLASSICAL AND QUANTUMM MECHANICS, GENERAL PHYSICS; FABRICATION; LASERS; OPTICS; PLATES; POLISHING; REMOVAL

Citation Formats

Menapace, J A, Davis, P J, Dixit, S, Campbell, J H, Golini, D, Hachkowski, M R, and Nelson, A. Imprinting continuously varying topographical structure onto large-aperture optical surfaces using magnetorheological finishing. United States: N. p., 2007. Web.
Menapace, J A, Davis, P J, Dixit, S, Campbell, J H, Golini, D, Hachkowski, M R, & Nelson, A. Imprinting continuously varying topographical structure onto large-aperture optical surfaces using magnetorheological finishing. United States.
Menapace, J A, Davis, P J, Dixit, S, Campbell, J H, Golini, D, Hachkowski, M R, and Nelson, A. Wed . "Imprinting continuously varying topographical structure onto large-aperture optical surfaces using magnetorheological finishing". United States. https://www.osti.gov/servlets/purl/909623.
@article{osti_909623,
title = {Imprinting continuously varying topographical structure onto large-aperture optical surfaces using magnetorheological finishing},
author = {Menapace, J A and Davis, P J and Dixit, S and Campbell, J H and Golini, D and Hachkowski, M R and Nelson, A},
abstractNote = {Over the past four years we have advanced Magnetorheological Finishing (MRF) techniques and tools to imprint complex continuously varying topographical structures onto large-aperture (430 x 430 mm) optical surfaces. These optics, known as continuous phase plates (CPPs), are important for high-power laser applications requiring precise manipulation and control of beam-shape, energy distribution, and wavefront profile. MRF's unique deterministic-sub-aperture polishing characteristics make it possible to imprint complex topographical information onto optical surfaces at spatial scale-lengths approaching 1 mm and surface peak-to-valleys as high as 22 {micro}m. During this discussion, we will present the evolution of the MRF imprinting technology and the MRF tools designed to manufacture large-aperture 430 x 430 mm CPPs. Our results will show how the MRF removal function impacts and limits imprint fidelity and what must be done to arrive at a high-quality surface. We also present several examples of this imprinting technology for fabrication of phase correction plates and CPPs for use in high-power laser applications.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Mar 07 00:00:00 EST 2007},
month = {Wed Mar 07 00:00:00 EST 2007}
}

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