Abstract: A wide-angle lens, an image capturing device and an electronic device.

Abstract: The optical system includes, successively in order from an object side to an image side: a first lens having a negative refractive power, an image side surface of the first lens being concave near an optical axis; a second lens having a positive refractive power, an object side surface thereof being convex near the optical axis, an image side surface of the second lens being concave near the optical axis; a third lens having a positive refractive power, an object side surface thereof being convex near the optical axis, an image side surface of the third lens being convex near the optical axis; a fourth lens having a negative refractive power; a fifth lens having a positive refractive power, an object side surface thereof being convex near the optical axis, an image side surface thereof being concave near the optical axis. The optical system satisfies the following condition: 0.58?R12/f?0.71.

Abstract: An ultrasonic component packaging structure includes a substrate, an ultrasonic component, a first pin, a second pin, and a protective shell. The substrate includes a first connection pad and a second connection pad. The ultrasonic component includes a first electrode and a second electrode that are electrically connected to the first connection pad and the second connection pad respectively. The first pin and the second pin are electrically connected to the first connection pad and the second connection pad respectively, and extend in an opposite direction of the ultrasonic component. The protective shell surrounds the substrate and the ultrasonic component, and is provided with a first opening to expose the ultrasonic component. Based on the design of the pins, the ultrasonic component can be fixed in a plugging manner, so that interference between ultrasonic components can be avoided, and a sensing distance can be effectively shortened.

Abstract: An optical imaging system sequentially includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side along an optical axis. The first lens has positive refractive power, with an object-side surface being convex at the optical axis; the second lens has refractive power, with an image-side surface being convex at the optical axis; the third lens has refractive power; the fourth lens has positive refractive power, with an image-side surface being convex at the optical axis; the fifth lens has negative refractive power, with an object-side surface being convex at the optical axis and an image-side surface being concave at the optical axis; a diaphragm is arranged between the object side of the optical imaging system and the fifth lens.

Abstract: An optical system, a lens module, and a terminal device are provided. The optical system includes a first lens and a fifth lens, each of which has a positive refractive power. The optical system also includes multiple lenses with refractive powers. Each of the first lens, a second lens, and a seventh lens has an object-side surface which is convex at an optical axis. Each of the third lens and a fifth lens has an image-side surface which is convex at the optical axis. The seventh lens has an image-side surface which is concave at the optical axis. The seventh lens has an inflection point on the object-side surface and/or the image-side surface. The optical system satisfies the expressions tan ?/ƒ>0.21 mm?1 and Y2/Y1+Y3/Y1+Y4/Y1<3.1.

Abstract: The assisted bracket for postoperative joint activity exercise is provided, including an inner shell bracket, a primary swing arm bracket, a secondary swing arm bracket, an angle sensor, and a shell body. By setting up an assisted bracket for postoperative joint activity exercise, the primary swing arm bracket is positioned on the proximal limb of the patient, and the secondary swing arm bracket is positioned on the distal limb of the patient. The angle sensor is connected to the mobile APP in electrical signals through a communication module to facilitate patient movement, it can drive the primary and secondary swing arm brackets to move, allowing the angle sensor to record their motion data, thereby monitoring the exercise amount and exercise frequency of the patient. This allows patients to better engage in rehabilitation exercises and improve the effectiveness of postoperative rehabilitation exercises.

Abstract: The present disclosure relates to a photoinitiating composition suitable for UV-LED light irradiation comprising: a) a photoinitiating system suitable for LED light irradiation having a wavelength in the range of 340-420 nm; b) a dispersing medium; wherein the dispersing medium comprises an organic solvent which is miscible with water.

Abstract: Provided are a UV-curable non-isocyanate polyurea polymer and a UV-curable coating composition containing the same. The UV-curable non-isocyanate polyurea polymer has one or more ethylenically unsaturated functional groups and the ethylenically unsaturated functional groups are attached to nitrogen atoms present in a backbone urea segment via —C(=0)- linkage. The nonisocyanate polyurea polymer is prepared by: (i) providing an ethylenically unsaturated compound having one or more carboxylic acid functional groups; and (ii) reacting said ethylenically unsaturated compound having one or more carboxylic acid functional groups with a multi-carbodiimide polymer to form the non-isocyanate polyurea polymer.

Abstract: The present disclosure raltes to an optical system, an image acquisition module and an electronic device. The optical system includes, successively in order from an object side to an image side: a first lens having a positive refractive power, an object side surface thereof being convex near an optical axis, an image side surface thereof being convex near the optical axis; a second lens having a negative refractive power, an object side surface thereof being convex near the optical axis, an image side surface thereof being concave near the optical axis; a third lens having a negative refractive power, an image side surface thereof being convex near the optical axis; a fourth lens having a positive refractive power; a fifth lens having a negative refractive power. The optical system satisfies the following condition: 11 mm?f/tan(HFOV)?12.5 mm.

Abstract: The optical system includes, successively in order from an object side to an image side: a first lens having a negative refractive power, an image side surface of the first lens being concave near an optical axis; a second lens having a positive refractive power, an object side surface thereof being convex near the optical axis, an image side surface of the second lens being concave near the optical axis; a third lens having a positive refractive power, an object side surface thereof being convex near the optical axis, an image side surface of the third lens being convex near the optical axis; a fourth lens having a negative refractive power; a fifth lens having a positive refractive power, an object side surface thereof being convex near the optical axis, an image side surface thereof being concave near the optical axis. The optical system satisfies the following condition: 0.58?R12/f?0.71.

Abstract: A wide-angle lens, an image capturing device and an electronic device.

Abstract: Embodiments of the disclosure provide an optical system, a lens module, and a terminal device. The optical system includes in order from an object side to an image side along an optical axis: a first lens with a positive refractive power, the first lens having an object-side surface which is convex at the optical axis; a second lens with a refractive power; a third lens with a refractive power; a fourth lens with a positive refractive power, the fourth lens having an object-side surface which is concave at the optical axis and an image-side surface which is convex at the optical axis; and a fifth lens with a negative refractive power. The second lens has an image-side surface cemented with an object-side surface of the third lens. The optical system satisfies the following expression: 1.0 mm?1<(n2+n3)/f1.4 mm?1.

Abstract: An optical imaging system (100) includes, in order from an object side to an image side, a first lens (L1) with a positive refractive power, a second lens (L2) with a refractive power, a third lens (L3) with a refractive power, and a fourth lens (L4) with a refractive power. The optical imaging system (100) further includes a stop (10) located in front of an imaging surface of the optical imaging system (100), and a first infrared filter (31) located between the first lens (L1) and the fourth lens (L4). A filter is located in the middle of the optical imaging system (100), which leaves room for shortening a back focal length and facilitates ultra-thin design.

Abstract: The present disclosure relates to an optical lens assembly, an image capturing apparatus and an electronic apparatus. The optical lens assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence from an object side to an image side along an optical axis. The first lens has positive focal power, with an object-side surface being convex at the optical axis. The second lens to the fifth lens all have focal power. The third lens has focal power has an object-side surface being convex at the optical axis and an image-side surface being concave at the optical axis. The fifth lens has an object-side surface being convex at the optical axis and an image-side surface being concave at the optical axis. The sixth lens has negative focal power.

Abstract: An optical imaging system sequentially includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side along an optical axis. The first lens has positive refractive power, with an object-side surface being convex at the optical axis; the second lens has refractive power, with an image-side surface being convex at the optical axis; the third lens has refractive power; the fourth lens has positive refractive power, with an image-side surface being convex at the optical axis; the fifth lens has negative refractive power, with an object-side surface being convex at the optical axis and an image-side surface being concave at the optical axis; a diaphragm is arranged between the object side of the optical imaging system and the fifth lens.

Abstract: An optical lens group comprises, in order from the object-side to the image-side: a first lens having positive refractive power, a second lens having positive refractive power, a third lens having negative refractive power, a fourth lens having negative refractive power, a fifth lens having positive refractive power, and a sixth lens having negative refractive power. The object-side surface of the first lens is concave at the perimeter of said lens, the image-side surface of said lens is convex at the perimeter of said lens; the image-side surface of the second lens is convex; the image-side surface of the third lens is concave, the object-side surface and the image-side surface of the fourth lens are both concave at the optical axis; the object-side surface of the fifth lens is concave at the perimeter of said lens; and the image-side surface of the sixth lens is concave at the optical axis.

Abstract: An optical system, a lens module, and a terminal device are provided. The optical system includes a first lens and a fifth lens, each of which has a positive refractive power. The optical system also includes multiple lenses with refractive powers. Each of the first lens, a second lens, and a seventh lens has an object-side surface which is convex at an optical axis. Each of the third lens and a fifth lens has an image-side surface which is convex at the optical axis. The seventh lens has an image-side surface which is concave at the optical axis. The seventh lens has an inflection point on the object-side surface and/or the image-side surface. The optical system satisfies the expressions tan ?/ƒ>0.21 mm?1 and Y2/Y1+Y3/Y1+Y4/Y1<3.1.

Abstract: An optical imaging system is provided. The optical imaging system includes, from an object side to an image side, a first lens with a positive refractive power, a second lens with a negative refractive power, a third lens with a positive refractive power, and an infrared cut-off filter. The infrared cut-off filter is located between the first lens and the second lens or between the second lens and the third lens. In this way, a miniaturization of the optical imaging system can be achieved, a step of the optical imaging system can be reduced, and stability of an assembly of the optical imaging system can be improved so as to improve a production yield of the optical imaging system and lower a cost. An image capturing apparatus and an electronic device are further provided.

Abstract: The disclosure provides an optical imaging system, an image capturing apparatus, and an electronic device. The optical imaging system of the disclosure includes from an object side to an image side: a first lens with a positive refractive power, a second lens with a refractive power, a third lens with a refractive power, and a fourth lens with a refractive power. The optical imaging system satisfying the following expression: TTL?2.644 mm, where TTL represents a distance from an object-side surface of the first lens to an imaging surface along an optical axis.

Abstract: The present disclosure relates to a photoinitiating composition suitable for UV-LED light irradiation comprising: a) a photoinitiating system suitable for LED light irradiation having a wavelength in the range of 340-420 nm; b) a dispersing medium; wherein the dispersing medium comprises an organic solvent which is miscible with water.