The three-range method typically used for color sensors can measure a maximum color distance of ΔE > 0.5. However, more demanding industrial requirements require test systems that can achieve a color accuracy of ΔE < 0.1. At present this is only possible by using color measurement systems based on the spectral value method. A year ago, Micro-Epsilon Eltrotec introduced the first online measurement system of this kind – the colorCONTROL ACS7000 with a ΔE < 0.08. New features have now been added to this system.
The innovative colorCONTROL ACS7000 color measurement system is used where color sensor measurements are not accurate enough. The system operates contact-free at distances up to 50 mm with a measuring geometry of 30°/0°. The measuring spot is 9 mm with a measurement accuracy of ΔE < 0.08. The measurement system provides a number of operating modes: users can employ one of several methods to perform simple measurements between color distance ΔE and the reference value: ΔE(CMC), ΔE99, ΔE94, ΔEDE2000. For spectral measurements, the user can choose between different color spaces: L*a*b*99, L*c*h*, L*c*h*99 were added to the conventional XYZ, L*a*b* and L*u*v*. Improved lighting brightness compensation and improved temperature compensation now support spectral measurements for lighting and plasma colors. All modes support measurement speeds up to 2 kHz.
colorCONTROL ACS7000 can be used for both production line measurements (inline) and for laboratory or sample measurements (offline). This measurement system is suitable for automotive paint inspection, interior color measurements, forensics, foils, injection moulding, wood, veneers, textiles, printing, medical technologies, and coating technology.
MICRO-EPSILON Eltrotec has more than 30 years’ experience in the quality control of color. Based in the German town of Uhingen, the company is part of the Micro-Epsilon Group.