基于PBA-ETO长磷光延时的紫外/可见高对比度探测

UV/Vis High Contrast Detection Based on Long Phosphorescence Delay of PBA-MEO

基于有机磷光材料PBA-ETO(乙氧基苯硼酸)的室温长磷光延时这一物理特性,通过波长转换的方法实现紫外信号的探测,因材料对紫外/可见信号存在较大的延时差异,通过斩波器、单片机、外触发工业相机实现原本空间信号时间上的分离,当斩波器处于通光状态时,紫外/可见混合信号被抓拍;当斩波器处于断光状态下时,紫外信号对应的转换信号被采集,通过数字图像处理的方法,实现二者的融合。为了进一步提升成像质量,根据衍射成像相关理论,结合CCD探测器的像素尺寸,提出一种周期为200μm金属微孔阵列结构,在实现紫外/可见对比度增强的基础上,图像细节、边缘轮廓得到进一步优化。

Based on the physical characteristics of long phosphorescence delay at room temperature of PBA-ETO(ethoxyphenylboronic acid),the detection of ultraviolet signal by wavelength conversion is realized. Because the material has large delay difference to ultraviolet/visible signal, the original space signal is separated in time by chopper, MCU and external trigger industrial camera. When the chopper is in the off light state, the conversion signal corresponding to the UV signal is collected, and the fusion of the two is realized by digital image processing. According to the theory of diffraction imaging, combined with the pixel size of CCD detector, a kind of metal microporous array structure with a period of 200 μm is proposed. On the basis of realizing the UV/VIS contrast enhancement, the image details and edge contour are further optimized.