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Optics Optimization in High-Resolution Imaging Module with Extended Depth of Field

机译：扩展景深的高分辨率成像模块中的光学优化

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The standard imaging lens for a high resolution sensor was modified to achieve the extended depth of field (EDoF) from 300 mm to infinity. In the module the raw sensor outputs are digitally processed to obtain high contrast images. The overall module is considered as an integrated computational imaging system (ICIS). The simulation results for illustrative designs with different amount of spherical aberrations are provided and compared. Based on the results of simulations we introduced the limiting value of the PSF Strehl ratio as the integral threshold criteria to be used during EDoF lens optimization. A four-element standard lens was modified within the design constraints to achieve the EDoF performance. Two EDoF designs created with different design methods are presented. The imaging modules were compared in terms of Strehl ratios, limiting resolution, modulation frequencies at 50% contrast, and SNR. The output images were simulated for EDoF modules, passed through the image processing pipeline, and compared against the images obtained with the standard lens module.
机译：修改了用于高分辨率传感器的标准成像镜头，以实现从300毫米到无限远的扩展景深（EF）。在模块中，原始传感器的输出经过数字处理以获得高对比度的图像。整个模块被认为是集成计算成像系统（ICIS）。提供并比较了具有不同球差量的说明性设计的仿真结果。基于仿真结果，我们介绍了PSF Strehl比的极限值，作为在电镜镜头优化过程中使用的整体阈值标准。在设计约束范围内对四元素标准镜片进行了修改，以实现EF性能。介绍了用不同的设计方法创建的两个EF设计。比较了成像模块的Strehl比率，极限分辨率，50％对比度下的调制频率和SNR。模拟了EF组件的输出图像，使其通过图像处理管道，并与标准镜头模块获得的图像进行了比较。

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