偏振图像比传统图像包含更为丰富的来自物体表面及浅表信息，因此可通过获取皮肤异常区与正常区的偏振信息进行皮肤状态的检测与评估。本项目搭建多波段激光照明式皮肤偏振成像系统，开展了蓝绿红三波段偏振激光照明下的正常皮肤、色素沉积皮肤和炎症皮肤的激光偏振成像实验。主要结果：1）488nm蓝光和520nm绿光激光照明下，色素沉积区、炎症区和正常皮肤区的偏振度数据有明显差异；2）660nm红光激光照明下，色素沉积区和正常皮肤区有明显差异，但炎症区和正常皮肤区数据接近；3）针对色素沉积区的三波长激光偏振图像信息比较相似。综合分析表明：在绿激光照明下获得模拟皮肤的偏振图像与偏振度数据，较容易区分正常皮肤与色素沉积及炎症皮肤区域之间的界面与差异；色素沉积区域偏振图像更为相似，表现为皮下同一深度信息；炎症区域偏振图像差异性大，为不同深度下皮肤的偏振信息。

The polarization images contains more information from surface and superficial surface than traditional image, so it can be used to detect and evaluate the skin state by obtaining the polarization information of abnormal and normal skin areas. This project built a multi-waveband laser-illuminated skin polarization imaging system, and carried out laser polarization images experiments on normal skin, pigment deposition region and inflammation region under blue, green and red three-waveband laser illumination. The main results were as follows: 1) Under 488nm blue light and 520nm green light laser illumination, the polarization degree data of the pigment deposition region, the inflammation region and the normal skin area were significantly different; 2) Under 660nm red laser illumination, there was a significant difference between the pigment deposition region and the normal skin area, but the data of the inflammatory region and the normal skin region were similar; 3) The polarization image information of the three-wavelength laser for the pigment deposition region is similar. The comprehensive analysis shows that the polarization image and polarization degree data of simulated skin under green laser illumination can easily distinguish the interface and difference between normal skin and pigment deposition and inflammatory skin area. The polarization images of the pigment deposition region are more similar, showing the same subcutaneous depth information. The polarization image of the inflammatory region has great difference, which is the polarization information of the skin at different depths.