Fig. 3.

Effects of emission photon scattering on PSF_em peak intensity and shape. (a) Decay profiles of PSF_em peak intensity and integrated intensity (over a 200 μm diameter circular area) as a function of normalized imaging depth down to $2.5\times l_{\text{s}}^{\text{em}}$. The lines denote best exponent fit of the data points. (b) Variations in the PSF_em lateral profile (PSF_em(r, φ) in cylindrical coordinates) with the imaging depth. The PSF_em profile was measured up to 100 μm in radius from peak location. Data points are connected by lines for eye guidance.