Colorimetry

Colorimetry is used to characterize and quantify the color perception of the human eye. The characteristics of light which is emitted by radiation or remitted by any object and arriving at the human eye can be objectively measured with a spectrophotometer. But this measurement of the color stimulus φ[λ] doesn’t represent the human perception of color. Therefore, the CIE had standardized the spectral sensitivity of the human eye. The sensitivity functions x[λ], y[λ] and z[λ] are shown in the image below. The color stimulus φ[λ] is rated with each cone function x[λ], y[λ] and z[λ] to compute the CIE 1931 XYZ color space tristimulus values. Y is similar to the luminosity. Any color can be represented by these three values. Based on these fundamental values a translation in various color spaces is possible, e.g. [x, y], [L*, a*, b*] or [L*, u*, v*].
 
tec5 MultiSpec® Pro software internally computes the recorded spectral data to numerical color results. The software natively provides color values in CIE 1931 [X, Y, Z, x, y], CIELAB, CIELUV and the derived coordinates of these color spaces. The MultiSpec® system allows color measurement both in transmission and reflection setup.

The spectrometer electronics of tec5 are used worldwide for color measurement in different application areas:
 
  • Print and paper industry
  • Chemical and pharmaceutical industry
  • Live science industry
  • Optical and glass industry