Photron on damage detection in transparent materials
2020-3-31  Views:3774
       Although transparent materials with birefringent properties (e.g., solar panels and separator films for secondary cells) are common, damage detection during the manufacturing process is crucial to economically realize high-quality materials. Laser ablation can generate stress wave passing through the material by non-contact impulse excitation. The pulsed stress wave induces the change of stress concentrations around damage, which can be measured as the two-dimensional birefringent phase differences using Photron high speed polarization camera system with a microsecond-order temporal resolution. It would allow us visual the damage in the material without using any invasive measurement.