Figure 3
From: Naked eye direction of arrival estimation with a Fresnel lens
Mapping between the incident angle (θ) and the focal point displacement. The red solid line is the numerical prediction, the black dashed-dotted line is the ray optics prediction (3). Focal displacement is the left y-axis. The blue solid line is the difference (δ) between the numerical and analytical data, the corresponding y-axis is on the right side.
