title: Photothermal radiometry probing of scars in the internal surface of a thin metal tube.
abstract: The principle and equipment of photothermal radiometry probing of scars in the internal surface of a thin metal tube are described. By measuring the amplitude frequency characteristics of the photothermal signal, we calculated the depth of the scars in the internal surface of a sample.
authors: P Z
authors: PZ
authors: Li
authors: G Y
authors: GY
authors: Zhou