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Proceedings Paper

The influence of flame fusion synthetic ruby red on color difference
Author(s): Xiang Li; Ying Guo
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Paper Abstract

The purpose of the study is to investigate the correlations among lightness, chroma and hue angle, confirming the lightness is the key factor to ruby color appearance by calculating color difference. Based on the uniform color space CIE 1976 L*a*b*, the lightness is correlated with hue angle. Purplish red rubies with the medium lightness(L*=40~50) and relatively high chroma (C*=25~35) displayed the best visual appearance by naked eyes. The result of partial correlation analysis revealed the correlation between ▵L* and ▵E* (r▵L*×▵E*=-0.992) is relatively higher than r▵C*×▵E* =0.919 and r▵L*×▵E* =0.885, which means that the change of ruby's color was mostly benefit from ▵L*, ▵C* and ▵H* had the little contribution to ▵E*. It is concluded that ▵L* is the key factor of ruby red evaluating, then followed by ▵C* and ▵H*.

Paper Details

Date Published: 12 November 2010
PDF: 7 pages
Proc. SPIE 7855, Optical Metrology and Inspection for Industrial Applications, 78552C (12 November 2010); doi: 10.1117/12.871738
Show Author Affiliations
Xiang Li, China Univ. of Geosciences (China)
Ying Guo, China Univ. of Geosciences (China)


Published in SPIE Proceedings Vol. 7855:
Optical Metrology and Inspection for Industrial Applications
Kevin Harding; Peisen S. Huang; Toru Yoshizawa, Editor(s)

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