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Study on Photoacoustic Effect of Epoxy Resin on Backing Material by Scanning Photoacoustic Microscope

Amplitude and phase of a photoacoustic signal generated from an epoxy resin on backings (aluminum, white acrylic resin and black-coated white acrylic resin) were measured by a scanning photoacoustic microscope. The experimental results were as follows. The photoacoustic signals for light-reflective backings (aluminum and white acrylic resin) were generated from the epoxy resin on the backing, while photoacoustic signals for light-absorptive backing (black coated white acrylic resin) were generated from the backing itself.