1. D / 8 geometric optical structure, conforming to CIE No.15, GB / T 3978, GB 2893, GB / T 18833, iso7724 / 1, ASTM e1164, din5033 teil7; 2. Adopt combined LED light source with high life and low power consumption, including UV / excluding UV; 3. Customized one 8mm or 4mm aperture ( the flat/ tip measuring aperture can be switched easily, which is suitable for more tested sample) 4. Dual optical path system, the optical resolution in the visible range is less than 10nm, which can measure the SCI and SCE spectrum of the sample at the same time; 5. Accurate spectrum and lab data, used for color matching and accurate color transmission;