Optical coherence tomography (OCT) is an inline process monitoring technology for laser welding with various applications in the pre-. in-. and post-process. In-process monitoring with OCT focuses on the measurement of weld depth by the placement of a singular measurement beam into the keyhole. https://www.itsmajorlook.com/great-deal-Chicago-Cubs-Earrings-Round-Design-p21310-limited-grab/