Anzagira Leo, Fossum Eric R
J Opt Soc Am A Opt Image Sci Vis. 2016 Jun 1;33(6):1147-54. doi: 10.1364/JOSAA.33.001147.
Research efforts in linear polarization imaging have largely targeted the development of novel polarizing filters with improved performance and the monolithic integration of image sensors and polarization filter arrays. However, as pixel sizes in CMOS image sensors continue to decrease, the same limitations that have an impact on color and monochrome CMOS image sensors will undoubtedly affect polarization imagers. Issues of low signal capacity and dynamic range in small pixels will severely limit the useful polarization information that can be obtained. In this paper, we propose to leverage the benefits of the relatively new Quanta image sensor (QIS) concept to mitigate the anticipated limitations of linear polarization imaging as pixel sizes decrease. We address, by theoretical calculation and simulation, implementation issues such as alignment of polarization filters over extremely small pixels used in the QIS concept and polarization image formation from single-bit output of such pixels. We also present design innovations aimed at exploiting the benefits of this new imaging concept for simultaneous color and linear polarization imaging.
线性偏振成像的研究工作主要集中在开发性能更优的新型偏振滤光片以及图像传感器与偏振滤光片阵列的单片集成上。然而，随着CMOS图像传感器像素尺寸不断减小，影响彩色和单色CMOS图像传感器的同样限制无疑也会影响偏振成像仪。小像素中低信号容量和动态范围的问题将严重限制可获取的有用偏振信息。在本文中，我们提议利用相对较新的量子图像传感器（QIS）概念的优势，以减轻随着像素尺寸减小线性偏振成像预期会出现的限制。我们通过理论计算和模拟，解决了诸如QIS概念中使用的极小像素上偏振滤光片的对准以及此类像素的单比特输出形成偏振图像等实现问题。我们还提出了旨在利用这种新成像概念的优势进行同时彩色和线性偏振成像的设计创新。
