NON-CONTACT TYPE SYSTEM AND METHOD FOR MEASURING THICKNESS USING LASER

摘要

The present invention relates to a non-contact type thickness measurement system using laser, and a non-contact type thickness measurement method using laser. More specifically, the non-contact type thickness measurement system comprises: a light radiation unit to generate laser to be radiated to an object by using a light source; a reception unit receiving a primary photoacoustic signal generated by a direct collision between the laser and a surface of the object and receiving a secondary photoacoustic signal generated by the laser while the laser is proceeded inside the object; and a measurement unit measuring received response waveforms of the primary photoacoustic signal and the secondary photoacoustic signal; and an analysis unit analyzing a response characteristic displayed by the measured response waveform to derive thickness of the object. The present invention analyzes tendency of the primary photoacoustic signal and the secondary photoacoustic signal generated by radiating the laser to the object in order to measure the thickness of the object.