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. 2010 Jul 27;1(1):318–323. doi: 10.1364/boe.1.000318/

Fig. 2.

Fig. 2

schematic experimental setup for dual mode scanning acoustic microscopy (DSAM): ring shaped illumination (IA) for the pulse echo-mode, free beam illumination (IP) for the photoacoustic mode; T: water filled tank; DET: piezoelectric ultrasound detector; CA: black coated axicon; DA: divergent optical axicon; OPA: operating area of the DSAM; Ri and Ro: inner and outer radii of the ultrasound detector.