为了研究不同颜色吸收体对光声成像的影响, 采用针状的 PVDF膜水听器, 接收面积的直径为 1 mm, 光源为 YAG激光器, 波长为 1 064 nm, 重复频率为 20 Hz, 脉宽为 6 ns。由仿真结果表明, 暗红、深红、红色对激光波长吸收较好, 而淡红色对激光波长吸收较差; 同样由实验结果表明, 黑色的头发和橡胶环对激光的吸收比淡红色的猪肝的吸收要强一些。

In order to study the influence from different color absorption on photoacoustic imaging, a needle PVDF hydrophone withdiameter of 1mm was used to detect photoacoustic signals; the laser had a pulse width of 6 ns anda repetition frequency of 20 Hz.The images of different gray scale absorption were obtained from experiments and simulation. The simulation results show that thestrong absorption can be observed when the laser irradiates on dull-red, crimson and red absorbers, however the absorption ability isweak to rosiness; we also find that the absorption of black hairs or rubber ring is stronger than rosiness pork liver by experiments.