"Micromechanical Photonics" offers a comprehensive introduction to the world of optical MEMS (Micro Electro Mechanical Systems) and micromechanical photonics. This textbook is aimed at engineering students and practicing engineers, combining theoretical foundations with experimental results. It covers a wide range of topics, including ultra-short external cavity lasers, tunable laser diodes, resonant sensors, and integrated optical heads. Additionally, the innovative technology of optical tweezers is presented, which is used in various research and industrial fields for manipulating objects. The book also discusses the design and fabrication of an optical rotor, as well as the evaluation of mixing performance of microfluids for future fluidic applications. The concluding chapter addresses the fundamentals and applications of the near field, which is significant for the future development of micromechanical photonics. The theoretical and experimental analyses, as well as applications related to optical recording, are also covered.