Abstract: A camera module includes a lens module, a circuit board, an image sensor, a lens holder and a filter. The lens holder includes a hollow main body and a bottom base connected to the main body. The main body is connected to the lens module. The bottom base defines a receiving cavity. A sidewall of the bottom based defines at least one mounting hole close to the hollow main body and communicating with the receiving cavity. The filter is positioned on the bottom base and received in the receiving cavity. The at least one mounting hole is configured for allowing the filter to enter into the receiving cavity or be taken out of the receiving cavity. The circuit board is positioned on the bottom base. The image sensor is received in the receiving cavity and electrically connected to the circuit board.

Abstract: A camera module includes a lens module, a circuit board, an image sensor, a lens holder and a filter. The lens holder includes a hollow main body and a bottom base connected to the main body. The main body is connected to the lens module. The bottom base defines a receiving cavity. A sidewall of the bottom based defines at least one mounting hole close to the hollow main body and communicating with the receiving cavity. The filter is positioned on the bottom base and received in the receiving cavity. The at least one mounting hole is configured for allowing the filter to enter into the receiving cavity or be taken out of the receiving cavity. The circuit board is positioned on the bottom base. The image sensor is received in the receiving cavity and electrically connected to the circuit board.

Abstract: A camera module includes a lens assembly and a base board assembly. The lens assembly includes a lens, an internally threaded seat, and a barrel receiving the lens. The base board assembly includes a printed circuit board and a light sensing chip for receiving light through the lens. The seat defines a receiving cavity at least partially receiving the printed circuit board and the light sensing chip.

Abstract: A cleaning device includes a rotary platform and a cleaning assembly. The rotary platform is used for rotating a workpiece. The cleaning assembly faces the rotary platform and is used for spraying cleaning fluid on the workpiece for a period of time to clean the workpiece and then spraying drying gas on the workpiece to dry the workpiece during the rotary platform rotates the workpiece.

Abstract: A lens holder comprises a suction part, at least one connecting part, and a transparent plate. The suction part defines a holding groove and a suction groove on two substantially opposite surfaces thereof respectively, and a connecting hole communicates with the holding groove and the suction groove, wherein the holding groove, the suction groove, and the connecting hole are coaxial. The connecting part is positioned on a side of the suction part and defines an air hole communicating with the connecting hole. The transparent plate is shaped corresponding to the holding groove and received in the holding groove.