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ColorTec-PCM/PSM LED Spectral Illumination The current 2000 series instruments use a combination of spectrally selective light sources, specifically Light Emitting Diodes, in combination with optical filters and spectrally selective detectors. The various optical configurations of this series are generally available with either a compliment intended for multi-illuminant colorimetry or an illumination compliment intended for spectral reporting.
Figure 1 shows the six individual spectral illumination channels of the standard multi-illuminant ColorTec-PCM series of colorimeters. These instruments are intended to report color space data for three illuminant/observer conditions and output in X,Y,Z which is then converted to standard colorimetry data (CIELAB, Hunter L,a,b, LCh, CMC and others on request).
Figure 2 shows the twelve individual spectral illumination channels used for spectral reporting in the ColorTec-PSM series of color spectrophotometers. In both of these plots the peak response of each channel has been normalized to unity. Data is output in 10nm or 20nm increments (400-700nm). Colorimetry output then follows standard published calculation methodology. Generally the PSM offers greater precision and improved inter-instrument agreement when compared to the same model of PCM. |
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