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利用飞秒激光聚焦辐照金属表面可以诱导出亚波长周期结构,从而实现金属表面着色.改变照明光入射角和样品水平旋转角,金属表面结构色的色调和亮度均发生变化,这说明结构成色具有方向性.为探究飞秒激光在金属表面着色的均匀性,基于国际光学照明委员会关于颜色差的规定对成色的偏差作了分析,结果表明,样品加工面积越大,颜色的均匀性越差.在设定的实验参数下,当样品加工面积达到64 mm2时,其边缘与中心颜色的差异可以被人眼明显察觉.通过制作两个彩色图标来展示结构色的方向性和均匀性对飞秒激光彩色标记实际应用的影响.
The use of femtosecond laser focus to irradiate the surface of the metal can be induced sub-wavelength periodic structure, in order to achieve the metal surface coloring.Changing the incident angle of illumination light and the sample level rotation angle, the metal surface structure of the color tone and brightness are changed, indicating that the structure of the color In order to investigate the uniformity of femtosecond laser on the metal surface, the deviation of the color condition was analyzed based on the International Commission of Illumination on Color Difference. The results showed that the larger the sample processing area, the worse the color uniformity Under the set experimental parameters, the difference between the edge and the center color can be obviously detected by the human eye when the sample processing area reaches 64 mm 2, and the two color icons are used to display the directionality and uniformity of the structure color. Seconds laser color marking the practical application of the impact.