
17.6 Lateral Superresolution
When the lateral resolution of a light microscope exceeds the diffraction limit of
Eq. 17.1, it is said to exhibit superresolution. Several forms of light microscopy
are able to surpass the Rayleigh limit and achieve superresolution. Some of
them utilize structured illumination [1, 17, 18], while others do not [19]. This
section follows the linear sinusoidal SIM approach and achieves a factor of 2
improvement in lateral resolution [2, 3].
17.6.1 Bypassing the Optical Transfer
Function
Optical systems pass a limited range of frequencies (see Chapter 2), as defined by
the optical transfer function (OTF). The highest frequency ...