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: An optical mechanism is provided, including a housing, a base, and a metal supporting member. The housing has a top cover and a sidewall connected to the top cover, wherein the top cover and the sidewall comprises plastic material. The base is connected to the housing, wherein an optical element is accommodated in a space between the housing and the base. At least a part of the metal supporting member is embedded in the housing.

Abstract: An active heat-dissipation system for a base station of a communication system includes a measuring module, configured to detect a temperature sensing signal of the base station; a controller, configured to receive the temperature sensing signal detected by the measuring module to set a preset temperature signal, to generate a difference between the temperature sensing signal and the preset temperature signal and a time derivative of the difference, and to output a control signal according to the difference and the time derivative of the difference based on a control program; and a power module, configured to receive the control signal and output an electrical signal to a heat-dissipation module according to the control signal, such that the heat-dissipation module performs a heat-dissipation process for the base station according to the electrical signal.