The 3OM concept unites three complementary domains: (1) Opto-Mechatronics is a blend of Optics & Photonics, Precision Mechanics, Electronics, Control & Automation, as well as IT. (2) Opto-Mechanics usually fills the gap between the high requirements of Optical Design and the capabilities of Mechanical technologies, addressing tolerances, errors, positioning issues, and methods to tackle them. Kinematic and dynamic aspects of optical systems with moving parts are also approached, and this leads back to Control & Automation, but also to material issues, involving for example Finite Element Analysis (FEA). (3) Optical Metrology is a large umbrella of applications which benefits from both domains above, and includes fields as diverse as industrial measurements (e.g., Non-Destructive Testing (NDT)), biomedical imaging (with a range of techniques, for example Optical Coherence Tomography (OCT) or Photoacoustics), Remote Sensing, as well as Security & Defense. Other fields that apply 3OM are also within the topics of the Conference, including Laser Manufacturing and Robotics, as well as Lasers in Medicine.