SUPER-RESOLUTION APERTURE SCANNING MICROSCOPE
SUPER-RESOLUTION APERTURE SCANNING MICROSCOPE
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DOI：
10.1038/237510a0
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发表时间：
1972-01-01
期刊：
影响因子：
64.8
通讯作者：
NICHOLLS, G
中科院分区：
文献类型：
--
作者：
ASH, EA;NICHOLLS, G
光学仪器分辨力的经典理论意味着，如果物体的细节明显小于照明辐射的一个波长λ0，那么对物体细节的观察就会受到限制。这道阿贝屏障并非完全无法逾越。Lukosz 1，2已经展示了如何通过使用互补的空间滤波器来进行因子2的改进。然而，在这个方向上进一步前进的尝试很快就失败了，因为人们试图传递的空间频率是这样的，波在人们希望它们传播的方向上变得渐逝。纳森斯坦发明了一种巧妙的方案，利用倏逝波来照亮物体，然后利用全息技术获得放大的图像。分辨能力由消逝波的波长决定。这个值小于λ0，但要设计出比λ 0小得多的系统并不容易。
THE classical theory of the resolving power of optical instruments implies a limit to the observation of details in an object if these are significantly smaller than one wavelength, λ0, of the illuminating radiation. This Abée barrier is not entirely impenetrable. Lukosz1,2has shown how an improvement by a factor of two can be made by the use of complementary spatial filters. Attempts to proceed further in this direction are soon frustrated, however, because the spatial frequencies one is seeking to transfer are such that the waves become evanescent in the direction in which one would like them to propagate. Nassenstein has developed an ingenious scheme3in which evanescent waves are used to illuminate the object, and a magnified image is obtained using a holographic technique. The resolution capability is determined by the wavelength of the evanescent wave. This is less than λ0, but it is not easy to devise systems where it would be very much smaller.