Design of mirror system in digital single lens reflex camera for high-speed continuous shooting

This research explores anti-vibration mechanisms for mirror systems in DSLR cameras through numerical methods such as explicit/implicit finite element analysis (FEA) and multi-body dynamics (MBD). Kinematic design of the movable mirrors, which guide incoming light, is carried out through MBD, and a two-dimensional mirror system geometry that increase the mirror area while allowing fast swing-up speeds can be obtained. The dynamic behaviors of mirror systems are predicted via explicit FEM and verified with modal analysis using implicit FEM. In addition, a prototype based on FEA results has been manufactured, and improved anti-vibration performance is confirmed via measurements of the dynamic behavior of the mirror system.