Abstract: An optical element driving mechanism is provided and includes a fixed assembly, a movable assembly, a driving assembly and a stopping assembly. The fixed assembly has a main axis. The movable assembly is configured to connect an optical element, and the movable assembly is movable relative to the fixed assembly. The driving assembly is configured to drive the movable assembly to move relative to the fixed assembly. The stopping assembly is configured to limit the movement of the movable assembly relative to the fixed assembly within a range of motion.

Abstract: The present invention discloses new calibration procedures for three-dimensional digital image correlation (3D-DIC) method comprising steps: providing a 3D-DIC system: arranging an object at a focus of a first image capture device and a second image capture device, and using a light source device to uniformly project light on the object, and linking the system to a processor capable of data processing and analyzing; providing a calibration plate: arranging the calibration plate at a position where the object is located; performing a system calibration procedures: treating the first and second image capture devices as an identical unit and rotating them simultaneously to acquire a plurality of calibration images of the calibration plate, wherein each calibration image contains a plurality of circles formed at an identical spacing which is preset to work out a plurality of system parameters through the spacings for measurement and calculation of the object.