Fig. 3: Measurement of FOV and angular sensitivity function (ASF) of the logarithmic μ-CE.

a Schematic illustration (top) and the focused light field images (bottom) of the logarithmic μ-CE; the incident angles are 0°, 30°, and 45°, respectively. b Comparison of the intensity distributions along the X-axis and Y-axis at normal incidence; the insert is an image of a focal point. c, d Normalized intensity distribution along the X-axis (c) and Y-axis (d) under different incident angles (0°, 30°, and 45°); the wavelength of the continuous light is 633 nm. e The normalized intensity distribution under normal incidence extracted from the focusing image (inset) along the dotted line. f ASF of the logarithmic μ-CE (FWHM = 12.1°).