Fig. 5.

Exemplary images taken using the flat-lens LWIR cameras. (A–C and E, G, I, and K) Images are taken with the f = 19 mm lens and Tau 2 core, and (D) image is with f = 8 mm and the LW-AAA camera. Object distance = $\left(z_o\right)$ and image distance = $\left(z_i\right)$ are labeled in the figures. (E, G, I, and K) The images and (F, H, J, and L) corresponding linescans of 2 holes in a metal block placed in front of a hot plate heated to 80 °C taken at increasing distances from the camera. The holes are well resolved at a distance as large as 762 mm, which corresponds to an angular resolution of $\sim$0.013°.