High-speed tomographic imaging measurement with photopyroelectric thermal wave detection equipment composed of arrayed multi-probes

A new high-speed measurement technique is proposed for photopyroelectric thermal wave equipment. The technique involves the use of arrayed detection multi-probes and small-size and simple-configuration arrayed multi-circuits, each of which corresponds to each of the probe. With the multi-probes, signals are detected in parallel and synchronously, drastically decreasing the measuring hours (=1/n, when the number of probes is n). Here, the distance between adjacent probes is optimized by analyzing the mutual electric field interference between the probes through analysis with the finite element method (FEM)