| 摘要 |
A method of colour assessment of a sample (10, fig. 3) with respect to a reference illuminant, includes illuminating the sample (10, fig. 3) with a light source (12, fig. 3) that comprises a fluorescent lamp 18 and a plurality of light-emitting diodes 24. The spectrum of the LEDs 24 supplements the spectrum of the fluorescent lamp 18 to reduce deviations between the combined spectrum of the light source (12, fig. 3) and a target spectrum. The LEDs 24 may be arranged so that their light passes though the bulb of the fluorescent lamp 18. In a further embodiment the LEDs (24, fig. 6) and fluorescent lamp (18, fig. 6) are positioned where they cannot shine directly onto the sample (10, fig. 3). Light from both sources is first mixed by reflection before entering a colour assessment cabinet (2, fig. 3). |
