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Converging spherical wave propagation in a hemispherical solid lens

2006; Springer Science+Business Media; Volume: 8; Issue: 6 Linguagem: Inglês

10.1088/1464-4258/8/6/013

1741-3567

Yaoju Zhang, Xuehua Ye, Junfeng Chen,

Advanced Fluorescence Microscopy Techniques

The propagation of converging spherical waves through a hemispherical solid lens (HSL) is studied, and the multiple reflections inside the HSL are considered. It is found that the reflectivity and transmissivity have an oscillatory behaviour related to the optical radius of the HSL. When the refractive index of the HSL is smaller than that of the sample, the small mismatch in refractive indices is preferable for transmission-mode microscopy. But when the refractive index of the HSL is larger than that of the sample, the reflectivity increases rapidly as the mismatch in refractive indices and the converging angle of incident light increase, the larger mismatch and converging angle are useful for reflection-mode microscopy. The magnitude of the whole reflectivity and its modulation depth are strongly sensitive to the incident polarization, which is also discussed.