Paper Title:
Influence of Light Source and Cathodoluminescence on the Color Parameters of Ruby Red
  Abstract

According to different light sources and cathodoluminescence (CL) intensity, the performance of color parameters (lightness L*, chromaticity a* and b*, chroma C*, hue angle ho) and chromophore contents (Cr3+, åFe) are studied to analyze the impact of all these elements on ruby red color. Ruby red under the standard light source D65 (a*=5.65 ~ 26.97, b*= -5.43~3.98) is similar with the color under natural sun-light. Purplish red ho Î (354.14°, 0.7°) with medium-low lightness (L* = 32 ~ 40) under D65 displays the best visual appearance, showing a relatively high value. Comparing with D65, standard light source A reveals ruby a deep red hue (a* = 10.61 ~ 37.39, b* = -6.59 ~ 7.50). Because of the strongest spectrum power distribution in the orange range and fluorescence of light source U30, the hue of orangish tone is mixed in ruby red (a* = 6.92 ~ 31.23, b* = 0.31 ~ 9.34). It is illustrated that åFe can inhibit the intensity of CL which is compared in different voltages. Low lightness purplish red is easy to be influenced by CL and always shows strong luminescence correspondingly. It is concluded that ruby purplish red has strong luminescence of CL which is usually supported by a few of åFe and medium-low lightness under D65, which has an excellent visual perception.

  Info
Periodical
Edited by
Yiwang Bao, Danyu Jiang, Li Tian and Jianghong Gong
Pages
379-383
DOI
10.4028/www.scientific.net/KEM.492.379
Citation
X. Li, Y. Guo, "Influence of Light Source and Cathodoluminescence on the Color Parameters of Ruby Red", Key Engineering Materials, Vol. 492, pp. 379-383, 2012
Online since
September 2011
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