三区振幅型超分辨光瞳滤波器的设计

Design of 3-Zone Amplitude-Type Superresolution Pupil Filters

提出运用非线性规划及目标规划法 ,在给定斯特雷耳比S(超分辨模型和艾里模型主瓣最大亮度比 )的条件下 ,设计出使成像系统的横向、轴向及三维分辨率分别达到最大值的环形振幅型超分辨光瞳滤波器。给出超分辨优化设计模型和实例 ,并作图验证其结果。对超分辨率伴随的旁瓣效应 ,把滤波器应用于共焦扫描系统 ,可有效地抑制旁瓣 ,提高成像信噪比和对比度。此方案用于三区以上振幅型超分辨滤波器及环形纯相位超分辨光瞳滤波器的设计 ,为超分辨滤波器的设计提供了参考。

At the special Strehl ratio( the ratio of the maximum intensity of the central core of the superresolving pattern to the Airy pattern) 3-zone amplitude-type pupil filters are designed by nonlinear programming and goal programming,which can let the imaging system resolutions of transverse,axial and 3-D reach the maximum. Some superresolution optimization design models and examples are presented with figures testification. To suppress the sidelobe intensity which is concomitant with the increase of the resolutions, these filters are used in confocal scanning microscopic system, as a result, higher signal-to-noise and good image contrasts are achieved. The strategie can also be applied to designing phase-only or more than 3-zone amplitude-type superresolution filters, which gives some references for the design of superresolution filters.