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. Author manuscript; available in PMC: 2015 Jan 8.
Published in final edited form as: Phys Rev Lett. 2014 Oct 20;113(17):174301. doi: 10.1103/PhysRevLett.113.174301

Fig. 2.

Fig. 2

(a) Lateral profiles of a sharp ink edge measured by OR-PAM and GR-PAM. OR-PAM has a lateral resolution of 0.65 µm, while GR-PAM has a lateral resolution of 0.41 µm. ESFs, edge spread functions; LSFs, line spread functions. (b) Axial profiles of OR-PAM and GR-PAM. The FWHM of the OR-PAM profile is 45 µm. The FWHM of the GR-PAM profile is 2.3 µm.