一种新型衍射超分辨光学器件

A New Superresolution Element

提出了一种提高通过光学系统的部分光线的空间频率 ,来提高系统分辨率的新型衍射超分辨光学器件。该器件通过把部分低频光线移到高频带 ,使得艾里斑的主斑变小 ,同时焦深也得到了延长。模拟计算结果表明 ,在中心峰值强度相等的条件下 ,用该器件所获得的超分辨效果比目前最好的纯相位型超分辨光阑要好。

A new superresolution element is proposed to increase the resolution of an optical system by improving part of the spatial frequency. i.e., to shift the lower spatial frequency light to high spatial frequency band. It makes the central maximum in the Airy pattern narrower and increases the depth of focus. Calculation results have shown that this kind of apodizer is superior to the phase\|shifting apodizer.