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Mirror reflection in measuring the color coordinates of reflecting samples

  • Optical Measurements
  • Published:
Measurement Techniques Aims and scope

Conclusions

Contrary to expectation, the presence of the first reflection had very little effect on the measurement results. The presence in the reflected luminous flux of the mirror component, which does not possess spectral selectivity, displaces the color coordinates of samples towards the color of the illumination source. The effect of the mirror component is particularly pronounced in evaluating the color coordinates of dark samples. Thus, in the case of the blue and red samples the displacement with respect to chromaticity attains 8 and 13 thresholds, and with respect to the total reflection coefficient from 36 to 130%. This effect is less noticeable on the yellow and azure samples with large reflection coefficients.

The evaluation of color coordinates from the measurements by the SF-2M spectrophotometer, after the exclusion of the mirror component, approaches closely the values obtained by means of the Beckman spectrophotometer and the VNIIM colorimeter under conditions of directional illumination.

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Literature cited

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Authors
  1. E. N. Yustova
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  2. G. P. Gal'nbek
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Yustova, E.N., Gal'nbek, G.P. Mirror reflection in measuring the color coordinates of reflecting samples. Meas Tech 7, 784–787 (1964). https://doi.org/10.1007/BF00981580

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  • DOI: https://doi.org/10.1007/BF00981580

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