specimen. For the same parameters used in the preceding example and with
n ¼ 1, the slices, or sections, should not be thicker than about 0:28 mm. The
technique of optical sectioning (see Chapter 14) accomplishes the same result but
is implemented by optical means. Besides being physically nondestructive, it
avoids the inconvenience of slicing and preparing sample slides. Optical section-
ing can be done using only the inherently limited DOF of the objective lens, but
it can be made considerably more effective with SIM. Optical sectioning with
structured illumination offers other benefits besides improving axial and lateral
resolution. By including feedback and iteration, light structure can be optimized
to correct for uneven illumination [4].
17.1.3 ...