Fig. 1. Schematic diagram of acousto-optic action

Fig. 2. Hanning window ultrasound waveform

Fig. 3. Two-dimensional model of tissue

Fig. 4. Mesh settings

Fig. 5. Relationship between acousto-optic signal and incident light intensity. (a)-(i) Relationship between acousto-optic signal and incident light intensity under absorption coefficient of 0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,and 0.9 cm^-1 in sequence

Fig. 6. Relationship between relative intensity of acousto-optic signal and absorption coefficient

Fig. 7. Comparison of simulation calculated value and preset value of absorption coefficient

Fig. 8. Experimental setup of acousto-optic imaging system

Fig. 9. Experimental sample and acousto-optic signal plots. (a) Picture of experimental sample;(b) acousto-optic signal image displayed on oscilloscope

Fig. 10. Relationship between acousto-optic signal and incident light intensity under different absorption coefficients. (a)-(i) Relationship between acousto-optic signal and incident light intensity under absorption coefficient of 0.254,0.356,0.457,0.664,0.817,0.919,1.021,1.072,and 1.276 cm^-1 in sequence

Fig. 11. Relationship between relative intensity of acousto-optic signal and absorption coefficient

Fig. 12. Comparison of experimental measured value and true value of absorption coefficient