Abstract: An annular aperture stop includes a first annular portion and a second annular portion. The first annular portion extends and slowly tapers towards the center of the aperture stop. The second annular portion extends inwards from the first portion and sharply tapers off to the innermost boundary of the aperture stop and defines a tapering angle. The radial thickness of the second portion is smaller than a predetermined tolerance of about 0.035 mm of the inner diameter of the aperture stop. The tapering angle is smaller than a predetermined threshold of about 70 degrees, whereby the innermost boundary of the aperture stop is protected from flashes during molding the aperture stop.

Abstract: A method for measuring a curved surface of an object is provided. The method aligns a point-cloud of an object and a triangulated curved surface of the object, obtain an original deviation value for each triangle on the triangulated curved surface by measuring a distance between each triangle and the nearest point in the point-cloud, and assign a color to each triangle according to a color assigned to a deviation range in which each original deviation value falls. The method further balances the assigned colors of all triangles on the triangulated curved surface, and generates a report according to data on the triangulated curved surface with the balanced colors.

Abstract: A shielding assembly comprises at least two shielding modules, each comprising a frame and a cover mounted on the frame. Each of the at least two covers comprises a plurality of engaging portions and a plurality of slots between each two adjacent engaging portions, and one portion of one of the at least two frames abuts one portion of another of the at least two frames. Each of the plurality of engaging portions of one of the at least two covers is received in a corresponding slot of another of the at least two covers to connect the at least two shielding covers to form a cover to reduce electromagnetic interference for an electronic components positioned on a circuit board.

Abstract: A method and a camera device that includes a proximity sensor that senses a current distance between a user and the camera device. The method and camera device acquires the current distance sensed by the proximity sensor, and triggers the camera device to take a photo of an object when the current distance is less than a preset distance of the camera device.

Abstract: An exemplary lens actuator includes a fixed unit, a movable unit, and a connecting member for connecting the fixed unit with the movable unit. The fixed unit includes a fixed barrel and a plurality of magnets mounted on the fixed barrel. The fixed barrel includes a first receiving cavity in a center thereof for receiving the movable unit therein. The movable unit includes a lens barrel, and a plurality of coils connected with the outer wall of the lens barrel and facing the respective magnets.

Abstract: An exemplary camera module includes a barrel, a holder, and a compressed resilient spring member. The barrel includes a first cylindrical part and a first threaded part. The first threaded part includes external threads. The barrel further includes a first surface facing the object side. The holder includes a second cylindrical part and a second threaded part. The second threaded part includes internal threads. The holder further includes a second surface facing the image side. The barrel is coupled to the holder via the internal threads and the external threads. A fit between the internal threads and the external threads is a clearance fit. The resilient spring member is sandwiched between the first surface of the barrel and the second surface of the holder.

Abstract: A wireless communication device includes a PCB, a grounded electrostatic protection element and an antenna. The PCB includes a ground and an antenna clearance portion. The ground portion includes a ground layer. The antenna clearance portion overlaps the antenna and includes a plurality of second key contacts, a plurality of ground contacts and a plurality of microstrips. The second key contacts are placed on a top surface of the PCB. The ground contacts and the microstrips are placed on a bottom surface of the PCB and corresponding to the second key contacts. The plurality of microstrips connect the plurality of ground contacts to the ground layer. The electrostatic protection element connects the second key contacts to protect them from electrostatic interference.

Abstract: An exemplary image stabilizing camera system includes a camera module. The camera module includes a movable AF unit, a frame having a receiving cavity defined therein, an electromagnetic driving unit, and an elastic member. The receiving cavity is configured for receiving the movable AF unit therein. The electromagnetic driving unit is configured for driving the movable AF unit to move relative to the frame so as to counteract movement of the object relative to the system such that the system can, after a shake of the system, capture a stabilized image of the object which is substantially identical with an image thereof captured without the shake of the system. The elastic member is disposed on a top end of the movable AF unit. The elastic member is configured for connecting the movable AF unit to the frame, thereby suspending the movable AF unit in the receiving cavity.

Abstract: An exemplary voice coil motor includes a housing and a movable unit. A top panel of the housing has two positioning through holes. The movable unit includes a barrel holder, and a coil wrapped around the barrel holder. The barrel holder has two positioning sockets corresponding to the two positioning through holes. Each of two positioning members is fittingly received through one positioning hole and in the corresponding positioning socket, such that the barrel holder is fixed relative to the housing while the positioning members are engaged in the positioning through holes and the positioning sockets.

Abstract: A fault detection circuit connects to and determines the occurrence of failure in an inverter circuit. The inverter circuit comprises three outputs to connect three groups of lamps respectively, and the fault detection circuit comprises a magnetic unit and a signal detection unit. The magnetic unit comprises first, second and third flux generating windings electrically connected to the three outputs of the inverter circuit, and a flux detection winding. If no fault occurs on the outputs of the inverter circuit, total flux generated by the flux generating windings is cancelled out. As long as any fault occurs on the outputs of the inverter circuit, flux generated by the flux generating windings cannot be canceled out, and the flux detection winding is electromagnetically coupled accordingly and driven by the generated flux to output a coupling signal, based on which the signal detection unit generates an alert signal accordingly.

Abstract: An exemplary wafer level lens module array includes a first lens array, a second lens array above the first lens array, and a spacer array between the first and second lens arrays. The first lens array includes a number of first lenses, and two first aligning structures. The second lens array includes a number of second lenses, and two second aligning structures. The spacer array includes a number of through holes, and two third aligning structures. The first aligning structures respectively align with the third aligning structures, thereby the first lenses are coaxial with the respective the through holes. The second aligning structures respectively align with the third aligning structures, thereby the second lenses are coaxial with the respective through holes.

Abstract: A lens module includes a holder, a barrel, a lens, and a focus ring. The barrel is accommodated in the holder and threadedly coupled to the holder. The lens is received in the barrel. The focus ring surrounds and is securely fixed with the barrel. The focus ring is sandwiched between the holder and the barrel. The focus ring has at least two protrusions formed on an outer surface thereof. The at least two protrusions are symmetrical about a center of the focus ring.

Abstract: In a system and method for testing a serial attached small computer systems (SAS) interface of a SAS controller, the SAS controller connects to a loopback dongle via the SAS interface. The SAS interface sends a first data packet to the loopback dongle, and receives a second data packet from the loopback dongle. If information in the second data packet is the same as information in the first data packet, the system and method transmits a first notification indicating that the SAS interface is functioning normally. Otherwise, the system and method transmits a second notification indicating that the SAS interface is not functioning normally.

Abstract: A method for testing a random-access memory (RAM) includes six tests. The first test is performed by performing a write and read test to storage locations of the RAM. The second test is performed by testing walking 1's across each data bus of the RAM. The third test is performed by testing walking 0's across the data bus of the RAM. The fourth test is performed by testing walking 1's across each address bus of the RAM. The fifth test is performed by testing walking 0's across the address bus bit of the RAM. The sixth test is performed by performing a write and read test to random blocks in the storage locations of the RAM.

Abstract: A fixture for a torque meter includes a bearing having a cylindrical stator and a rotor, two or more arms, and two or more elastic members. The cylindrical stator defines a through hole therein. The rotor is rotatably received in the through hole and is configured for holding the torque meter. The at least two arms are respectively connected to two opposite sides of the cylindrical stator. Each of the elastic members elastically supporting a corresponding arm, a compression direction and a rebound direction of the elastic members are parallel to a rotation axis of the rotor.

Abstract: An actuator includes a first barrel, a second barrel, a first magnetic portion, a second magnetic portion and a plurality of springs. The second barrel is received in the first barrel. The first magnetic portion and the second magnetic portion are arranged between the first barrel and the second barrel. The first magnetic portion is fixed to the first barrel. The second magnetic portion is fixed to the second barrel. The first magnetic portion is opposite to the second magnetic portion. The first and second magnetic portions cooperatively drive the second barrel to move in the first barrel on the plane perpendicular to a central axis of the first barrel. The springs are elastically connected to the first barrel and to the second barrel, to provide a restoring force between the first barrel and the second barrel when the first barrel is not coaxial with the second barrel.

Abstract: A detection device for detecting a distance between centers of two through holes includes a support member, a base member, and a measurement member. The base member and the measurement member are set on opposite ends of the support member. The base member is operable to enter one of the through holes. A distance between a center of the base member and a center of the measurement member is equal to a normal distance between centers of the two through holes. If an actual distance between the centers of the two through holes meets a determined specification, the measurement member will enter the other through hole. If the actual distance between the centers of the two through holes does not meet the determined specification, the measurement member cannot enter the other through hole.

Abstract: A shell for housing a voice coil motor (VCM) includes a casing and a cover. The casing defines a rectangular opening and two opening respectively in two opposite edges of the rectangular opening. The casing extends a pair of stripping strips into each opening and towards each other. The cover correspondingly defines two grooves. The cover covers the rectangular opening and each pair of gripping strip is bent into a corresponding groove to grip the cover.