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Fluorescence of ceramic color standards
Annette Koo1, John F Clare, Kathryn M Nield
1Measurements Standards Laboratory, Industrial Research Limited,P.O. Box 31-310 Lower Hutt 5040, New Zealand. a.koo@irl.cri.nz
Applied Optics
|April 23, 2010
Summary
Fluorescence in color standards can cause significant errors in color measurement instruments. This study investigates the nature of this fluorescence and its impact on calibration and verification processes.
Area of Science:
- Color Science
- Metrology
- Materials Science
Background:
- Color standards are used for calibrating and verifying color measuring instruments.
- Fluorescence has been detected in some commercially available color standards.
- This fluorescence occurs at specific excitation and emission wavelengths.
Purpose of the Study:
- To investigate the nature of fluorescence in color standards.
- To determine the implications of this fluorescence for color measurement accuracy.
- To assess the impact on calibration and verification of color instruments.
Main Methods:
- Analysis of fluorescence excitation and emission spectra in color standards.
- Evaluation of the impact of fluorescence on colorimetric measurements using ceramic tiles.
- Comparison of measurement results under different calibration modes.
Main Results:
- Fluorescence is excited below 600 nm and emitted above 700 nm.
- This fluorescence falls within silicon photodiode response but is at the edge for photomultipliers.
- Significant measurement errors were observed on two ceramic tiles due to fluorescence when used across different measurement modes.
Conclusions:
- Fluorescence in color standards poses a significant challenge for accurate color measurement.
- The observed fluorescence can lead to substantial errors, particularly when instruments are calibrated and used under varying conditions.
- Understanding and accounting for fluorescence is crucial for reliable color calibration and verification.
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