半球形固体浸没透镜显微系统的透射光场研究

应用高数值孔径系统的矢量衍射理论研究了半球形固体浸没透镜(SIL)球面表面的反射对SIL系统透射场的影响.研究结果表明,半球形SIL球面表面的反射对SIL显微系统的透射光强产生很大的影响.然而,这种反射不改变半球形SIL显微系统的分辨率.SIL球面介质界面材料的折射率失配越大,透射光强减小越多.在SIL的球面表面涂上减反膜或者在物镜和SIL之间填充折射率较大（但比SIL的折射率小）的介质可以提高系统的透射光强.     

Optimizing the optical field distribution of solid immersion lens system by a continuous phase filter

In solid immersion lens(SIL)microscopy systems with high numerical aperture(NA),there always exists the aberration produced by Fresnel effects at the interface between SIL and the sample.This aberration may cause the degradation of the image of sample.We design a continuous phase filter and optimize the optical field distribution of SIL system.The numerical results show that when the continuous phase filter is used,the field distribution of SIL system can be optimized,and the focal depth and intensity of transmitted light can be increased.At the same time,the intensity of side-lobe and the resolution are kept almost unchanged.