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Proceedings Paper

Improved precision of absolute thermal-expansion measurements for ULE glass
Author(s): Mary J. Edwards; Emily H. Bullock; Deborah E. Morton
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Paper Abstract

Improvements made in the ultrasonic thermal expansion measurement methods used at Corning Incorporated have significantly increased the precision of absolute CTE measurements on ULETM glass. Precise CTE data were required for modeling the performance of 8-meter mirror blanks. Several repeatability and reproducibility studies for many of the measurements performed throughout the 8- meter process were performed. Measurement equipment and procedures were then improved to obtain the required precision. A volume of absolute CTE data collected during the manufacture of three 8-meter mirror blanks is summarized, showing excellent results. Comparison with previously demonstrated precision is also given.

Paper Details

Date Published: 11 November 1996
PDF: 6 pages
Proc. SPIE 2857, Advanced Materials for Optical and Precision Structures, (11 November 1996); doi: 10.1117/12.258287
Show Author Affiliations
Mary J. Edwards, Corning Inc. (United States)
Emily H. Bullock, Corning Inc. (United States)
Deborah E. Morton, Corning Inc. (United States)


Published in SPIE Proceedings Vol. 2857:
Advanced Materials for Optical and Precision Structures
Mark A. Ealey, Editor(s)

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