中文摘要：

为便捷实时测量紫外线指数（ultraviolet index,UVI）,从响应速度、热稳定性、耐疲劳性和成本这四个方面对常见的几种光致变色化合物进行筛选评估,采用萘并吡喃型光致变色化合物（NP1）,制备染料掺杂溶胶,浸镀法制备变色薄膜,并组装紫外线检测卡。紫外线指示卡上的变色膜遇紫外线辐射后,其变色信息被手机摄像头拍摄后,像素信息被换算为灰度数据（Gy）,其与紫外线指数呈有较好的线性关系,据此建立了一种基于智能手机客户端应用的紫外线指数测量方法,方便普通消费者随时测量所处环境的紫外线指数,并适时做好防护准备。

英文摘要：

To determine the ultraviolet index（UVI）, a number of photochromic compounds were evaluated via the aspects as responsive speed, thermal stability, fatigue durability and cost. The naphthopyran compound （NP1） was selected and the photochromic film were prepared by sol-gel method. A UVI indication card was fabricated as well. The grayscale of the photochromic film could be measured by the camera in the smartphone and was observed to have a good linear relationship to the UVI, thus a convenient method for measurement of UVI value based on the smartphone was proposed.