Improved precision of absolute thermal-expansion measurements for ULE glass

Details Improved precision of absolute thermal-expansion measurements for ULE glass Improved precision of absolute thermal-expansion measurements for ULE glass

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996spie.2857...58e&link_type=abstract

Proc. SPIE Vol. 2857, p. 58-63, Advanced Materials for Optical and Precision Structures, Mark A. Ealey; Ed.

Computer Science

Performance

3

Scientific paper

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.

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