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. Author manuscript; available in PMC: 2019 Jul 2.
Published in final edited form as: Proc SPIE Int Soc Opt Eng. 2018 Feb 19;10494:104945U. doi: 10.1117/12.2290594

Fig. 2.

Fig. 2

System resolution calibration using a chromium grating coated on a coverslip. (a) Fitted edge spread function (ESF) and line spread function (LSF) of experimental data shows that PAM has a lateral resolution of 4.1 μm. (b) Summation of two A-line axial spread function shows that PAM has an axial resolution of 37.0 μm. (c) Fitted ESF and LSF of experimental data show that OCT has a lateral resolution of 3.8 μm at −6 dB. (d) A-line spread function shows that OCT has an axial resolution of 4.0 μm at −6 dB in air.