| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical nondestructive inspection method and an optical nondestructive inspection apparatus which are capable of, more easily, in a shorter time, and more properly inspecting a pressure-welding state of pressure-welding parts of two work-pieces coupled to each other by pressure-welding but without being deposited, in which the pressure-welding part on one work-piece and the pressure-welding part on the other work-piece are configured of a conductive member.SOLUTION: The optical nondestructive inspection method includes: a heating step of setting a measurement spot SP on a surface of a work-piece, and irradiating the measurement spot with a heating laser using a heating laser source 21, infrared ray detection means 31, first and second correction laser sources 71, 72, first and second correction laser detection means 71R, 72R, and control means 50; a temperature rise characteristics acquisition step of acquiring temperature rise characteristics of the measurement spot based on an infrared ray emitted from the measurement spot and reflectance rates of the first and second correction lasers; and a determination step of determining the quality of pressure-welding states including a contact area and a contact pressure on pressure-welding parts 91B, 92B based on the temperature rise characteristics. |
