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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 35 — Dec. 10, 2012
  • pp: 8350–8359

Optimized pitch button blocking for polishing high-aspect-ratio optics

Michael D. Feit, Richard P. DesJardin, William A. Steele, and Tayyab I. Suratwala  »View Author Affiliations

Applied Optics, Vol. 51, Issue 35, pp. 8350-8359 (2012)

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Pitch button blocking (PBB), involving attaching small pitch buttons between the back of a thin workpiece (i.e., optic) and a blocking plate, enables noncompliant convergent polishing in which the workpiece stiffness and block interface strength are maintained. This process has been optimized, and practical design criteria (number, size, and spacing of pitch buttons) have been determined both experimentally and theoretically using a thermoelastic model. The optimized PBB process has been successfully implemented on 100–265 mm sized workpieces with aspect ratios up to 45, resulting in maximum peak-to-valley heights of <|0.1|μm after blocking and polishing.

© 2012 Optical Society of America

OCIS Codes
(160.2750) Materials : Glass and other amorphous materials
(220.4610) Optical design and fabrication : Optical fabrication
(220.5450) Optical design and fabrication : Polishing

ToC Category:
Optical Design and Fabrication

Original Manuscript: September 18, 2012
Manuscript Accepted: October 29, 2012
Published: December 5, 2012

Michael D. Feit, Richard P. DesJardin, William A. Steele, and Tayyab I. Suratwala, "Optimized pitch button blocking for polishing high-aspect-ratio optics," Appl. Opt. 51, 8350-8359 (2012)

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