Development of TIF based figuring algorithm for deterministic pitch tool polishing

Hyun Su Yi, Sug Whan Kim, Ho Soon Yang, Yun Woo Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Pitch is perhaps the oldest material used for optical polishing, leaving superior surface texture, and has been used widely in the optics shop floor. However, for its unpredictable controllability of removal characteristics, the pitch tool polishing has been rarely analysed quantitatively and many optics shops rely heavily on optician's "feel" even today. In order to bring a degree of process controllability to the pitch tool polishing, we added motorized tool motions to the conventional Draper type polishing machine and modelled the tool path in the absolute machine coordinate. We then produced a number of Tool Influence Function (TIF) both from an analytical model and a series of experimental polishing runs using the pitch tool. The theoretical TIFs agreed well with the experimental TIFs to the profile accuracy of 79 % in terms of its shape. The surface figuring algorithm was then developed in-house utilizing both theoretical and experimental TIFs. We are currently undertaking a series of trial figuring experiments to prove the performance of the polishing algorithm, and the early results indicate that the highly deterministic material removal control with the pitch tool can be achieved to a certain level of form error. The machine renovation, TIF theory and experimental confirmation, figuring simulation results are reported together with implications to deterministic polishing.

Original languageEnglish
Title of host publication3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies
Subtitle of host publicationAdvanced Optical Manufacturing Technologies
DOIs
Publication statusPublished - 2007 Dec 1
Event3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Advanced Optical Manufacturing Technologies - Chengdu, China
Duration: 2007 Jul 82007 Jul 12

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6722
ISSN (Print)0277-786X

Other

Other3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Advanced Optical Manufacturing Technologies
CountryChina
CityChengdu
Period07/7/807/7/12

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Yi, H. S., Kim, S. W., Yang, H. S., & Lee, Y. W. (2007). Development of TIF based figuring algorithm for deterministic pitch tool polishing. In 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies [67220K] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6722). https://doi.org/10.1117/12.782849