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A solid immersion lens (SIL) has higher magnification and higher numerical aperture than common lenses by filling the object space with a high-refractive-index solid material. SIL was originally developed for enhancing the spatial resolution of optical microscopy. 〔Wu et al. (Realization of numerical aperture 2.0 using a gallium phosphide solid immersion lens ) Applied Physics Letters 75(26) 4064 (1999). 〕 There are two types of SIL: * Hemispherical SIL: Theoretically capable of increasing the numerical aperture of an optical system by , the index of refraction of the material of the lens. * Weierstrass SIL (''superhemispherical SIL'' or ''superSIL''): the height of the truncated sphere is , where r is the radius of the spherical surface of the lens. Theoretically capable of increasing the numerical aperture of an optical system by . ==Applications of SIL== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「solid immersion lens」の詳細全文を読む スポンサード リンク
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