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Title: Method and system for processing optical elements using magnetorheological finishing

Abstract

A method of finishing an optical element includes mounting the optical element in an optical mount having a plurality of fiducials overlapping with the optical element and obtaining a first metrology map for the optical element and the plurality of fiducials. The method also includes obtaining a second metrology map for the optical element without the plurality of fiducials, forming a difference map between the first metrology map and the second metrology map, and aligning the first metrology map and the second metrology map. The method further includes placing mathematical fiducials onto the second metrology map using the difference map to form a third metrology map and associating the third metrology map to the optical element. Moreover, the method includes mounting the optical element in the fixture in an MRF tool, positioning the optical element in the fixture; removing the plurality of fiducials, and finishing the optical element.

Inventors:
; ; ;
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1078141
Patent Number(s):
8271120
Application Number:
61230793
Assignee:
Lawrence Livermore National Security, LLC (Livermore, CA)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B24 - GRINDING B24B - MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING
DOE Contract Number:  
AC52-07NA27344
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Menapace, Joseph Arthur, Schaffers, Kathleen Irene, Bayramian, Andrew James, and Molander, William A. Method and system for processing optical elements using magnetorheological finishing. United States: N. p., 2012. Web.
Menapace, Joseph Arthur, Schaffers, Kathleen Irene, Bayramian, Andrew James, & Molander, William A. Method and system for processing optical elements using magnetorheological finishing. United States.
Menapace, Joseph Arthur, Schaffers, Kathleen Irene, Bayramian, Andrew James, and Molander, William A. Tue . "Method and system for processing optical elements using magnetorheological finishing". United States. https://www.osti.gov/servlets/purl/1078141.
@article{osti_1078141,
title = {Method and system for processing optical elements using magnetorheological finishing},
author = {Menapace, Joseph Arthur and Schaffers, Kathleen Irene and Bayramian, Andrew James and Molander, William A},
abstractNote = {A method of finishing an optical element includes mounting the optical element in an optical mount having a plurality of fiducials overlapping with the optical element and obtaining a first metrology map for the optical element and the plurality of fiducials. The method also includes obtaining a second metrology map for the optical element without the plurality of fiducials, forming a difference map between the first metrology map and the second metrology map, and aligning the first metrology map and the second metrology map. The method further includes placing mathematical fiducials onto the second metrology map using the difference map to form a third metrology map and associating the third metrology map to the optical element. Moreover, the method includes mounting the optical element in the fixture in an MRF tool, positioning the optical element in the fixture; removing the plurality of fiducials, and finishing the optical element.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {9}
}

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Works referenced in this record:

High-energy, high-average-power laser with Nd:YLF rods corrected by magnetorheological finishing
journal, January 2005


A Large-Bandwidth, Cylindrical Offner Pulse Stretcher for a High-Average-Power, 15 Femtosecond Laser
conference, January 2009


Femtosecond pulse shaping using spatial light modulators
journal, May 2000


NIF final optics system: frequency conversion and beam conditioning
conference, May 2004

  • Wegner, Paul J.; Auerbach, Jerome M.; Biesiada, Jr., Thomas A.
  • Lasers and Applications in Science and Engineering, SPIE Proceedings
  • https://doi.org/10.1117/12.538481

MRF applications: on the road to making large-aperture ultraviolet laser resistant continuous phase plates for high-power lasers
conference, October 2006

  • Menapace, Joseph A.; Davis, Pete J.; Steele, William A.
  • Boulder Damage Symposium XXXVIII: Annual Symposium on Optical Materials for High Power Lasers, SPIE Proceedings
  • https://doi.org/10.1117/12.696329

Utilization of magnetorheological finishing as a diagnostic tool for investigating the three-dimensional structure of fractures in fused silica
conference, December 2005

  • Menapace, Joseph A.; Davis, Pete J.; Steele, William A.
  • Boulder Damage Symposium XXXVII: Annual Symposium on Optical Materials for High Power Lasers, SPIE Proceedings
  • https://doi.org/10.1117/12.638840

Magnetorheological finishing for imprinting continuous-phase plate structures onto optical surfaces
conference, June 2004

  • Menapace, Joseph A.; Dixit, Sham N.; Genin, Francois Y.
  • XXXV Annual Symposium on Optical Materials for High Power Lasers: Boulder Damage Symposium, SPIE Proceedings
  • https://doi.org/10.1117/12.527822

MRF applications: measurement of process-dependent subsurface damage in optical materials using the MRF wedge technique
conference, December 2005

  • Menapace, Joseph A.; Davis, Pete J.; Steele, William A.
  • Boulder Damage Symposium XXXVII: Annual Symposium on Optical Materials for High Power Lasers, SPIE Proceedings
  • https://doi.org/10.1117/12.638839

Improved Optical Quality for Ti:Sapphire using MRF
conference, January 2008