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Convergent Polishing: A Simple, Rapid, Full Aperture Polishing Process of High Quality Optical Flats &amp; Spheres
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Rigid conformal polishing tool using non-linear visco-elastic effect.

Dae Wook Kim1, James H Burge

  • 1College of Optical Sciences, University of Arizona, 1630 E. University Blvd, Tucson, Arizona 85721, USA. letter2dwk@hotmail.com

Optics Express
|February 23, 2010
PubMed
Summary
This summary is machine-generated.

A new rigid conformal polishing tool uses a non-Newtonian fluid to achieve stable tool influence function (TIF) for computer-controlled optical surfacing. This innovation enables precise polishing of aspheric surfaces with excellent surface finish.

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Area of Science:

  • Optical Engineering
  • Materials Science

Background:

  • Computer-controlled optical surfacing (CCOS) requires a stable tool influence function (TIF) for predictable surface generation.
  • Traditional pitch tools offer rigidity for spherical surfaces but are unsuitable for aspheric shapes.
  • Flexible polishing tools (air bonnet, magnetorheological fluid) conform to surfaces but lack intrinsic stiffness for natural smoothing.

Purpose of the Study:

  • To develop a novel rigid conformal polishing tool for aspheric surfaces.
  • To achieve both surface conformity and intrinsic stiffness in a polishing tool.
  • To demonstrate TIF stability and high-quality surface finish using the new tool.

Main Methods:

  • Design and analysis of a rigid conformal polishing tool utilizing a non-linear visco-elastic (non-Newtonian) medium.
  • Integration of the tool into a computer-controlled optical surfacing process.
  • Evaluation of TIF stability and resulting surface roughness.

Main Results:

  • The developed tool conforms to aspheric surfaces while maintaining rigidity.
  • Achieved TIF stability of less than 10%.
  • Produced optical surfaces with a roughness of less than 10 Angstroms.

Conclusions:

  • The rigid conformal polishing tool effectively addresses limitations of existing CCOS technologies for aspheric surfaces.
  • The use of non-Newtonian fluids offers a viable solution for stable and precise optical surfacing.
  • This technology enables high-precision manufacturing of complex optical components.