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. 2024 Oct 18;14:24434. doi: 10.1038/s41598-024-72634-2

Fig. 15.

Fig. 15

(a) Schematic layout of ultrasonic microscope detection system, provided by Intelligent Optical Systems. Red line represents fibre optic cables, while green line represents electrical cables; (b) Snapshot of microscopic image capture through inbuilt microscope, showing focal spot (yellow spot) of diameter < 1 μm; (c) Calculation of laser spot size using standard 20–80 knife edge width.