... Colorimeter changes the traditional structure thoroughly, employs the digital X( λ ),Y( λ ),Z( λ ) sensors to replace the traditional analogue sensors, employs ... . Measuring distance: 0.7m to infinity • Color Coordinates x, y, u, v(u', v'): (Luminance more than 10cd/m2) Accuracy(x ... , y): ±0.002(CIE Standard A-source, 100cd/m2) Repeatability(x, y): ±0 ...