Color the instrument is a colorimeter, through direct measurements and color are proportional to the tristimulus value of instrument response value, where the tristimulus value.

• 色度测度所用的仪器是色度计，堵住不间接测度得回与颜色的不一刺激值不败比例的仪器反响数值，换算不入颜色的不一刺激值。