Advancement of Optical Methods & Digital Image Correlation in Experimental Mechanics, Volume 2 of the Proceedings of the 2025 SEM Annual Conference & Exposition on Experimental and Applied Mechanics , the second volume of five from the Conference, brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on a wide range of optical methods ranging from traditional photoelasticity and interferometry, DIC and DVC techniques, and newer advances in photonics. Included are papers in the following general technical research areas: DIC/DVC Applications and Challenges DIC/DVC Methods Photoelasticity and Fringe Analysis Session to celebrate the retirement of Prof. Fu-Pen Chiang of Stonybrook University Optical Methods in Industrial Applications Interferometry and Photonic Methods in Experimental Mechanics Advancement of Optical Methods