Automated calibration and control for polarization-resolved second harmonic generation on commercial microscopes - Fig 4

<p>(a, b) An overview of the ellipticity, <i>ρ</i>, between the minimum and maximum electric field component of the polarization for different HWP and QWP combinations for two different microscopes. For linearly polarized light the ellipticity is 0, and for circularly polarized light the ellipticity is 1. The overlaying plots indicate which waveplate combinations generate linearly polarized light (black lines) and circularly polarized light (black and white circles) as determined by fitting a theoretical model. The white crosses in each plot indicates the HWP and QWP settings used when measuring the polarization illustrated in (c) and (e). The white circles correspond similarly to plots (d) and (f). The single measurements had an ellipticity of <i>ρ</i> = 0.29 (c), <i>ρ</i> = 0.86 (d), <i>ρ</i> = 0.19 (e) and <i>ρ</i> = 0.97 (f).