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. 2013 Mar 13;3:1441. doi: 10.1038/srep01441

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Normalized line intensity profiles of the (a) confocal, (b) negative confocal, and (c) FED images for two nanoparticles separated by λ/4. Line profiles of PSF for (d) negative confocal and (e) FED imaging under different saturation factors: (red curve), (green curve), and (blue curve). (f) Attainable resolution of FED, in units of illumination beam wavelength, as a function of the saturation factor under different subtractive factors: r = 0.7 (red curve), r = 0.85 (blue curve), and r = 1 (black curve). All the simulated results are presented with an objective lens of NA = 1.4.

Inline graphic — Normalized line intensity profiles of the (a) confocal, (b) negative confocal, and (c) FED images for two nanoparticles separated by λ/4. Line profiles of PSF for (d) negative confocal and (e) FED imaging under different saturation factors: (red curve), (green curve), and (blue curve). (f) Attainable resolution of FED, in units of illumination beam wavelength, as a function of the saturation factor under different subtractive factors: r = 0.7 (red curve), r = 0.85 (blue curve), and r = 1 (black curve). All the simulated results are presented with an objective lens of NA = 1.4.