Fig. 6: Hologram-related process characterization of HDPS.
a Surface deviation and deviation distribution between manufactured and theoretical holograms. b Pressure patterns obtained via finite element analysis for the theoretical hologram (b-left) and scanned manufactured hologram (b-right). c Image and printing resolution investigation by changing OD and f0, a theoretical mandala image (c-center) is constructed in low resolution (c-left) by OD = 25 mm, f0 = 1.5 MHz and high resolution (c-right) by OD = 64 mm, f0 = 4.5 MHz. d, e Correlation and NMSE with respect to OD and f0 for the theoretical mandala image (c-center). f The image plane location, Ztarget, and its effect on Correlation and NMSE.
